@article {ADFM:ADFM201603294,
	title = {Photopatterned Multidimensional Fluorescent Images},
	journal = {Advanced Functional Materials},
	volume = {26},
	number = {46},
	year = {2016},
	pages = {8471{\textendash}8477},
	keywords = {counterfeit, covert, FLUORESCENCE, imaging, PHOTOCHEMISTRY},
	issn = {1616-3028},
	doi = {10.1002/adfm.201603294},
	url = {http://dx.doi.org/10.1002/adfm.201603294},
	author = {Christensen, Peter R. and Wolf, Michael O.}
}
@article {Martin-Diaconescu2009,
	title = {Effects of hyperconjugation on the electronic structure and photoreactivity of organic sulfonyl chlorides.},
	journal = {Inorg. Chem.},
	volume = {48},
	number = {3},
	year = {2009},
	month = {feb},
	pages = {1038{\textendash}44},
	publisher = {The University of British Columbia, Department of Chemistry, Vancouver, British Columbia V6T 1Z1.},
	abstract = {The electronic structure of organic sulfonyl compounds of the form RSO(2)G (G = -Cl, -OH, -CH(3)) is investigated to evaluate the effect of aryl R groups on photocleavage of the S-G bond. Sulfur K-edge X-ray absorption spectroscopy (XAS) provides a direct measure of the empty low-lying molecular orbitals in these complexes and, in combination with DFT calculations, a detailed description of the bonding in these compounds. The presence of an aryl group bound to the sulfonyl moiety has a significant impact on the spectroscopy and electronic structure of the site. The analysis suggests that the SCl(sigma*) orbital is significantly affected by mixing with the aryl pi* manifold. This mixing is dependent upon the nature of G and is most pronounced in the sulfonyl chlorides, where the energy of the SCl(sigma*) orbital is lowered by approximately 0.5 eV. The observed mixing is best described as excited-state hyperconjugation of the aryl pi system into the SCl(sigma*) orbital. The magnitude of the effect can be estimated directly from the S K-edge XAS spectra. These results are discussed in relation to the observed photochemistry of RSO(2)Cl, which is significantly enhanced when R = aryl as compared to alkyl substituents.},
	keywords = {DFT, ELECTRONS, models, MOLECULAR, molecular structure, Organic Chemicals, Organic Chemicals: chemistry, PHOTOCHEMISTRY, Spectrum Analysis, Sulfinic Acids, Sulfinic Acids: chemistry, sulfur redox, XAS},
	issn = {1520-510X},
	doi = {10.1021/ic801665f},
	url = {http://pubs.acs.org/doi/abs/10.1021/ic50073a047 http://www.ncbi.nlm.nih.gov/pubmed/19132932},
	author = {Martin-Diaconescu, Vlad and Kennepohl, Pierre}
}
@article {ISI:000264792600048,
	title = {Redox photochemistry of methionine by sulfur K-edge X-ray absorption spectroscopy: potential implications for cataract formation.},
	journal = {J. Am. Chem. Soc.},
	volume = {131},
	number = {10},
	year = {2009},
	month = {mar},
	pages = {3577{\textendash}82},
	abstract = {The photochemistry of methionine, methionine sulfoxide, and methionine sulfone have been investigated by using sulfur K-edge X-ray absorption spectroscopy to explore the redox photochemical processes under different conditions. Methionine is easily photooxidized to the sulfoxide and the sulfone in the presence of dioxygen. In the absence of oxidant, photoirradiation leads to the one-electron-oxidized cation radical with no further reaction, suggesting that an alternative mechanism for photooxidation of thioethers through direct oxidation is feasible. The photochemistry of methionine sulfoxide allows for independent oxidative and reductive processes. Photoreduction of the sulfoxide leads back to the parent thioether under both aerobic and anaerobic conditions. Photooxidation occurs only under aerobic conditions. In contrast, methionine sulfone is photochemically inert. These results provide new insights into potential photochemical processes that may lead to cataract formation.},
	keywords = {Cataract, Cataract: etiology, METHIONINE, Methionine: chemistry, Oxidation-Reduction, PHOTOCHEMISTRY, Spectrum Analysis, Spectrum Analysis: methods, sulfur redox, XAS},
	issn = {1520-5126},
	doi = {10.1021/ja806946r},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/19226173},
	author = {Karunakaran-Datt, Anusha and Kennepohl, Pierre}
}
@article {ISI:000244896900002,
	title = {Sulfur K-edge XAS as a probe of sulfur-centered radical intermediates.},
	journal = {J. Am. Chem. Soc.},
	volume = {129},
	number = {11},
	year = {2007},
	month = {mar},
	pages = {3034{\textendash}5},
	abstract = {Sulfur K-edge XAS is used in the identification and characterization of sulfur based radicals obtained from UV irradiated glutathione. Ground state and time-dependent DFT calculations are used to identify thiyl (RS center dot) and perthiyl (RSS center dot) radical species.},
	keywords = {DFT, Free Radicals, Free Radicals: analysis, Free Radicals: chemistry, GLUTATHIONE, Glutathione: chemistry, Oxidation-Reduction, PHOTOCHEMISTRY, SPECTROMETRY, SPECTROPHOTOMETRY, Sulfhydryl Compounds, Sulfhydryl Compounds: chemistry, SULFUR, sulfur redox, Sulfur: chemistry, ULTRAVIOLET, X-Ray Emission, X-Ray Emission: methods, XAS},
	issn = {0002-7863},
	doi = {10.1021/ja0676760},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/17319664},
	author = {Martin-Diaconescu, Vlad and Kennepohl, Pierre}
}
@article {1304,
	title = {Asymmetric synthesis of dihydrofurans via a formal retro-Claisen photorearrangement},
	journal = {Journal of the American Chemical Society},
	volume = {127},
	number = {8},
	year = {2005},
	note = {ISI Document Delivery No.: 901URTimes Cited: 13Cited Reference Count: 36},
	month = {Mar},
	pages = {2725-2730},
	type = {Article},
	abstract = {Solution-phase irradiation of a series of syn-7-benzoylnorbornene derivatives is shown to lead to cis-fused dihydrofuran derivatives in low quantum but excellent chemical yields in what is formally a retro-Claisen rearrangement. In analogy to the well-known Paterno-Buchi reaction, the first step of the rearrangement is suggested to involve (n,pi*)(3)-mediated addition of the carbonyl oxygen to the norbornene double bond, producing a triplet 1,4-biradical. This intermediate, rather than closing to the oxetane, undergoes cleavage accompanied by intersystem crossing to form the dihydrofuran. To determine whether the retro-Claisen photorearrangement could be carried out enantioselectively, the 7-benzoylnorbornene reactant was equipped with a para-carboxylic acid substituent to which a series of optically pure amines was attached ionically via salt bridges. Irradiation of these salts in the crystalline state followed by diazomethane workup (the solid-state ionic chiral auxiliary method) was shown to afford the corresponding dihydrofuran in optical yields as high as 93\% at 95\% conversion. X-ray crystallography revealed that the enantioselectivity arises from crystallization of the reactant in a conformation in which the carbonyl oxygen is more favorably oriented for bond formation to one end of the norbornene double bond than the other, thus leading to a predominance of a single enantiomer.},
	keywords = {FURANS, GENERAL-APPROACH, INDUCTION, PHENYL KETONES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, REARRANGEMENT, SOLID-STATE},
	isbn = {0002-7863},
	url = {<Go to ISI>://000227308100059},
	author = {Xia, W. J. and Yang, C. and Patrick, B. O. and Scheffer, J. R. and Scott, C.}
}
@article {1145,
	title = {Discrimination in the solid-state photodimerization of 1-methyl-5,6-diphenylpyrazin-2-one},
	journal = {European Journal of Organic Chemistry},
	number = {5},
	year = {2005},
	note = {ISI Document Delivery No.: 903LHTimes Cited: 5Cited Reference Count: 18},
	month = {Feb},
	pages = {847-853},
	type = {Article},
	abstract = {1-Methyl- and 1-ethyl-5,6-diphenylpyrazin-2-one crystallize in two modifications, one of which is light-stable and the other light-sensitive. The light-sensitive modification is known to undergo photodimerization in the solid state. This polymorph crystallizes in the monoclinic space group P2(1) with two crystallographically independent molecules in the asymmetric unit. The molecules are packed in stacks running parallel to the unique b axis. The two independent molecules are arranged alternately along the stack. In principle, there are two different pairs of molecules within a stack that can undergo photodimerization, and each should form a different enantiomer. A large crystal was irradiated and a solution of the product was separated by HPLC. The optical purity of the (+)-enantiomer sample was estimated to be greater than 90 \%. This finding indicates that only one of the two pairs undergoes photoreaction. The structure of a single crystal of the pyrazinone was elucidated by X-ray diffractometry before and after irradiation with a laser at a wavelength of 488 nm to 19 \% conversion. The results of the crystal-structure determinations provide additional evidence that only one of the two pairs of molecules undergoes photodimerization although there are no significant differences between the distances between the reacting centers. Furthermore, the latter results suggest that weak hydrogen bonds are a dominant factor that determines which of the two pairs is dimerized upon irradiation. ((C) Wiley-VCH Verlag GmbH \& Co. KGaA, 69451 Weinheim, Germany, 2005).},
	keywords = {chirality, crystal structure, DIMERIZATION, enantioselectivity, PHOTOCHEMISTRY, SINGLE-CRYSTAL PHOTODIMERIZATION, solid-state reactions},
	isbn = {1434-193X},
	url = {<Go to ISI>://000227426900009},
	author = {Kaftory, M. and Shteiman, V. and Lavy, T. and Scheffer, J. R. and Yang, M. and Enkelmann, V.}
}
@article {1306,
	title = {Orbital-overlap control of the reactivity of a bicyclic 1-hydroxy-1,4-biradical},
	journal = {Angewandte Chemie-International Edition},
	volume = {44},
	number = {32},
	year = {2005},
	note = {ISI Document Delivery No.: 957JYTimes Cited: 13Cited Reference Count: 23},
	pages = {5087-5089},
	type = {Article},
	keywords = {4-BIRADICALS, ASYMMETRIC INDUCTION, asymmetric synthesis, CHIRAL AUXILIARY APPROACH, CONFORMATIONAL MEMORY, ORGANIC-PHOTOCHEMISTRY, PHOTOCHEMICAL-SYNTHESIS, PHOTOCHEMISTRY, radicals, solid-state reactions, STATE REACTIVITY, STEREOSELECTIVITY, structure-activity relationships, TRIPLET 1},
	isbn = {1433-7851},
	url = {<Go to ISI>://000231367300019},
	author = {Yang, C. and Xia, W. J. and Scheffer, J. R. and Botoshansky, M. and Kaftory, M.}
}
@article {1075,
	title = {Photochemistry of 9-methylbicyclo[3.3.1]nonyl aryl ketones - A novel 1,5-disproportionation of 1,4-hydroxy biradicals and asymmetric induction using the solid-state ionic chiral auxiliary method},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {83},
	number = {9},
	year = {2005},
	note = {ISI Document Delivery No.: 001VETimes Cited: 4Cited Reference Count: 29},
	month = {Sep},
	pages = {1460-1472},
	type = {Article},
	abstract = {A novel 1.5-disproportionation reaction has been discovered for 1,4-hydroxy biradicals derived from the photolysis of 9-methylbicyclo[3.3.1]nonyl phenyl ketones (1), which undergo mainly Yang cyclization both in Solution and the solid state. By applying the solid-state ionic chiral auxiliary method of asymmetric synthesis to the Yang cyclization, enantiomeric excesses as high as 95\% were achieved at high reaction conversions. The origin of the reaction selectivity is discussed with the help of X-ray crystallography. In addition, the solid-state photoreaction of ketone 1b was found to occur in a single crystal-to-single crystal fashion.},
	keywords = {1, 4-hydroxy biradical, asymmetric, BEHAVIOR, CRYSTAL-STRUCTURE, disproportionation, HYDROGEN-BOND, INDUCTION, ionic chiral auxiliary, PHOTOCHEMISTRY, PHOTOCYCLIZATION, reaction, REACTIVITY CORRELATIONS, SALTS, single crystal-to-single crystal},
	isbn = {0008-4042},
	url = {<Go to ISI>://000234570000030},
	author = {Chen, S. and Patrick, B. O. and Scheffer, J. R.}
}
@article {811,
	title = {1,4-hydroxybiradical behavior revealed through crystal structure - Solid-state reactivity correlations},
	journal = {Journal of the American Chemical Society},
	volume = {126},
	number = {11},
	year = {2004},
	note = {ISI Document Delivery No.: 804GETimes Cited: 21Cited Reference Count: 27},
	month = {Mar},
	pages = {3511-3520},
	type = {Article},
	abstract = {Structure- reactivity correlations for triplet 1,4-hydroxybiradicals in solution are made difficult by the presence of multiple reactive conformers and the possibility of conformation-dependent intersystem crossing. These problems can be overcome by working in the crystalline state, where the conformations of the 1,4-hydroxybiradicals are fixed and determinable by X-ray crystallography of the parent ketones, assuming that hydrogen atom abstraction occurs with little or no change in conformation. This approach is applied to 15 bi- and tricyclic ketones designed to have slightly different biradical conformations, so that the effect of small and incremental changes in geometry on biradical behaviour can be tested. The results indicate that, while geometry does have a strong influence on 1,4-hydroxybiradical partitioning between cyclization, cleavage, and reverse hydrogen transfer, a full understanding of the results requires that the strain involved in forming the cyclization products be taken into account.},
	keywords = {4-BIRADICALS, BIRADICALS, CONFORMATIONAL MEMORY, GEOMETRIC REQUIREMENTS, II REACTION, ORGANIC-SYNTHESIS, PHENYL KETONES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, STEREOSELECTIVITY, TRIPLET 1},
	isbn = {0002-7863},
	url = {<Go to ISI>://000220286400046},
	author = {Braga, D. and Chen, S. and Filson, H. and Maini, L. and Netherton, M. R. and Patrick, B. O. and Scheffer, J. R. and Scott, C. and Xia, W. J.}
}
@article {579,
	title = {Asymmetric synthesis in a Norrish type II cleavage reaction induced by crystal chirality},
	journal = {Photochemical \& Photobiological Sciences},
	volume = {2},
	number = {11},
	year = {2003},
	note = {ISI Document Delivery No.: 744RDTimes Cited: 0Cited Reference Count: 17},
	pages = {1052-1055},
	type = {Article},
	abstract = {Moderate to high enantiomeric excesses for the cis and trans olefinic products of a Norrish type II cleavage reaction have been obtained for the first time through the use of the solid- state ionic chiral auxiliary approach.},
	keywords = {CIS, HULA-TWIST, PHOTOCHEMISTRY, STATE},
	isbn = {1474-905X},
	url = {<Go to ISI>://000186645200002},
	author = {Charette, A. B. and Chong, K. C. W. and Fournier, J. F. and Patrick, B. and Scheffer, J. R.}
}
@article {727,
	title = {The photochemistry of trans-1,4,4,4-tetraphenylbut-2-en-1-one: A highly efficient aryl migration (type B) enone photorearrangement},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {81},
	number = {6},
	year = {2003},
	note = {ISI Document Delivery No.: 706UATimes Cited: 0Cited Reference Count: 18},
	month = {Jun},
	pages = {705-708},
	type = {Article},
	abstract = {Photolysis of trans-1,4,4,4-tetraphenylbut-2-en-1-one (3) in acetonitrile or benzene leads to trans-cis isomerization (7) along with rearrangement to trans-1 -benzoyl-2,2,3-triphenylcyclopropane(8). Formation of the latter product represents a new example of the aryl migration (type B) enone photorearrangement reaction first reported by Zimmerman and co-workers for 4,4-diphenylcyclohex-2-en-1-one (1). The quantum yield in the case of enone 3 (0.4) is approximately 10 times greater than that for 4,4,-diphenylcyclohex-2-en-1-one, a result that is ascribed to steric acceleration of phenyl migration from the triphenylmethyl group plus greater resonance stabilization of the intermediate biradical.},
	keywords = {aryl migration, ASYMMETRIC INDUCTION, di-pi-methane, enone, EXPLORATORY ORGANIC PHOTOCHEMISTRY, MECHANISM, MIGRATION, PHENYL, PHOTOCHEMISTRY, PHOTOCYCLIZATION, REARRANGEMENT, STATE},
	isbn = {0008-4042},
	url = {<Go to ISI>://000184472400035},
	author = {Scheffer, J. R. and Vishnumurthy, K.}
}
@article {710,
	title = {Preorganization of achiral molecules for asymmetric synthesis through crystallization-induced immobilization in homochiral conformations},
	journal = {Angewandte Chemie-International Edition},
	volume = {42},
	number = {32},
	year = {2003},
	note = {ISI Document Delivery No.: 716PRTimes Cited: 19Cited Reference Count: 24},
	pages = {3775-3777},
	type = {Article},
	keywords = {asymmetric synthesis, CRYSTAL, crystal engineering, GEOMETRIC REQUIREMENTS, II, INDUCTION, KETONES, PHOTOCHEMICAL-REACTIONS, PHOTOCHEMISTRY, PHOTOCYCLIZATION, reaction, REACTIONS, REACTIVITY, SOLID-STATE, topochemistry},
	isbn = {1433-7851},
	url = {<Go to ISI>://000185038000009},
	author = {Patrick, B. O. and Scheffer, J. R. and Scott, C.}
}
@article {532,
	title = {Enhanced regioselectivity of Yang photocyclization in the crystalline state},
	journal = {Organic Letters},
	volume = {4},
	number = {7},
	year = {2002},
	note = {ISI Document Delivery No.: 536BDTimes Cited: 9Cited Reference Count: 13},
	month = {Apr},
	pages = {1071-1074},
	type = {Article},
	abstract = {[GRAPHICS] In contrast to the solution state, where Yang photocyclization of ketones of general structure 1 leads to equal amounts of cyclobutanols 2 and 3 (by abstraction of H-A and H-B, respectively), irradiation in the crystalline state is much more regioselective, favoring either 2 or 3 depending on the nature of the substituent X. X-ray crystallography and molecular mechanics calculations reveal the source of this remarkable solid-state regioselectivity.},
	keywords = {ABSTRACTION, GAMMA, GEOMETRIC REQUIREMENTS, II REACTION, PHOTOCHEMISTRY, SOLID-STATE},
	isbn = {1523-7060},
	url = {<Go to ISI>://000174680100006},
	author = {Vishnumurthy, K. and Cheung, E. and Scheffer, J. R. and Scott, C.}
}
@article {5185,
	title = {2000 Alfred Bader Award Lecture - In the footsteps of Pasteur: asymmetric induction in the photochemistry of crystalline ammonium carboxylate salts},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {79},
	number = {4},
	year = {2001},
	note = {ISI Document Delivery No.: 429PNTimes Cited: 51Cited Reference Count: 52},
	month = {Apr},
	pages = {349-357},
	type = {Article},
	abstract = {This review describes the development of a new, synthetically useful method of asymmetric synthesis in organic photochemistry. Similar in many ways to the Pasteur procedure for resolving racemic carboxylic acids and organic amines, the method relies on the use of crystalline organic salts in which the enantioselectivity of a photochemical reaction of an achiral organic ion (for example, a carboxylate anion) is governed in the solid state by the presence of an optically pure counterion (for example, an optically active ammonium ion). Such optically pure counterions are termed ionic chiral auxiliaries. Salts containing ionic chiral auxiliaries are required to crystallize in chiral space groups, which provide the asymmetric environment necessary for chiral induction. Using this methodology, we have obtained near-quantitative optical yields in a wide variety of photochemical reactions.},
	keywords = {ABSOLUTE-CONFIGURATION CORRELATION, ACID-DERIVATIVES, asymmetric synthesis, chiral auxiliaries, crystal structure-reactivity relationships, di-pi-methane, GEOMETRIC REQUIREMENTS, II REACTION, ionic chiral auxiliaries, ORGANIC-PHOTOCHEMISTRY, PHOTOCHEMISTRY, solid state, SOLID-STATE PHOTOCHEMISTRY, STRUCTURE-REACTIVITY RELATIONSHIPS, YANG PHOTOCYCLIZATION REACTION},
	isbn = {0008-4042},
	url = {<Go to ISI>://000168526300001},
	author = {Scheffer, J. R.}
}
@article {5187,
	title = {Enantioselective photochemical synthesis of a beta-lactam via the solid state ionic chiral auxiliary method},
	journal = {Synthesis-Stuttgart},
	number = {8},
	year = {2001},
	note = {ISI Document Delivery No.: 448GETimes Cited: 12Cited Reference Count: 20Sp. Iss. SI},
	pages = {1253-1257},
	type = {Article},
	abstract = {Photolysis of crystals of a carboxylic acid-containing N,N-dialkylarylglyoxylamide to which an optically pure ammonium ion (the ionic chiral auxiliary) has been attached through a salt bridge leads to a 91\% isolated yield of a beta -lactam in greater than 99\% enantiomeric excess. Suspension of the crystals in hexane allows the photoreaction to be carried out on a 500 mg scale, thus demonstrating the synthetic utility of the solid stare ionic chiral auxiliary approach to asymmetric synthesis.},
	keywords = {ACHIRAL OXO AMIDE, ACID, asymmetric synthesis, beta-lactam, chiral auxiliaries, CRYSTALLINE STATE, HOST, INCLUSION COMPLEXES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, solid state},
	isbn = {0039-7881},
	url = {<Go to ISI>://000169617900022},
	author = {Scheffer, J. R. and Wang, K. Y.}
}
@article {5186,
	title = {Solid state organic chemistry - Stepping it up},
	journal = {Science},
	volume = {291},
	number = {5509},
	year = {2001},
	note = {ISI Document Delivery No.: 408HKTimes Cited: 8Cited Reference Count: 13},
	month = {Mar},
	pages = {1712-1713},
	type = {Editorial Material},
	keywords = {LENSES, PHOTOCHEMISTRY},
	isbn = {0036-8075},
	url = {<Go to ISI>://000167320600032},
	author = {Scheffer, J. R. and Scott, C.}
}
@article {4923,
	title = {Enantioselective photoelectrocyclization of a tropolone derivative in the crystalline state},
	journal = {Journal of Physical Organic Chemistry},
	volume = {13},
	number = {9},
	year = {2000},
	note = {ISI Document Delivery No.: 349GNTimes Cited: 5Cited Reference Count: 15},
	month = {Sep},
	pages = {531-538},
	type = {Article},
	abstract = {Achiral tropolone ethers are well known to undergo photochemically induced disrotatory electrocyclic ring closure in solution to form racemic bicyclo[3.2.0]hepta-3,6-dien-2-one derivatives. The present paper reports successful efforts to carry out this transformation enantioselectively through the use of the solid-state ionic chiral auxiliary method. in this method, the reactant, an achiral tropolone ether, is equipped with a carboxylic acid group to which an optically pure amine can be attached by salt formation. Salts such as these are required to crystallize in chiral space groups, which provide asymmetric reaction cavities capable of differentiating enantiomeric transition states. Irradiation of these materials in the solid state leads to enantiomerically enriched products in moderate to high enantiomeric excess depending on the amine employed. Of the amines studied, the best results were obtained with 1-phenylethylamine and 1-amido-2-indanol, which gave enantiomeric excesses in the 60-80\% range depending on the extent of conversion. Because the tropolone ring is planar, it is suggested that the stereochemical outcome of the electrocyclization in the solid state is governed by environmental crystal lattice effects rather than by the initial conformation of the reactant. Copyright (C) 2000 John Wiley \& Sons, Ltd.},
	keywords = {ALKYL ETHERS, ASYMMETRIC INDUCTION, crystalline tropolones, electrocyclic ring closure, enantioselective photoelectrocyclization, PHOTOCHEMISTRY, PHOTOREACTIONS, SOLID-STATE, YANG PHOTOCYCLIZATION REACTION},
	isbn = {0894-3230},
	url = {<Go to ISI>://000089037500007},
	author = {Scheffer, J. R. and Wang, L. T.}
}
@article {4766,
	title = {An investigation of the solid-state photochemistry of alpha-mesitylacetophenone derivatives: Asymmetric induction studies and crystal structure-reactivity relationships},
	journal = {Tetrahedron},
	volume = {56},
	number = {36},
	year = {2000},
	note = {ISI Document Delivery No.: 351GHTimes Cited: 10Cited Reference Count: 24},
	month = {Sep},
	pages = {6739-6751},
	type = {Article},
	abstract = {The photochemical conversion of a series of alpha-mesitylacetophenone derivatives into 2-indanols via delta-hydrogen abstraction has been investigated in the solid state. A correlation between solid-state reactivity and crystal structure has been established for this type of reaction. For the seven compounds whose crystal structures were determined, the average value of d (C=O...H distance) and L (C=O...CH3 distance) were 2.77+/-0.04 Angstrom and 3.42+/-0.06 Angstrom, and the value of omega (delta-H out of plane angle), d (C=O...H angle) and a (C-H...O angle) were 59+/-2 degrees, 80+/-7 degrees and 123+/-3 degrees, respectively. These parameters depended mainly on the magnitude of the deviation of the carbonyl group from the fully bisecting position over the mesityl ring, which ranged from 9-14 degrees in the case of in the solid state reactive ketones and approached 0 degrees for the unreactive compounds. Asymmetric induction studies were carried out by providing the reactants with carboxylic acid substituents to which ionic chiral auxiliaries were attached through salt formation with optically active amines. Irradiation of the salts (13 in total) in the crystalline state gave enantiomeric excesses of up to 90\%. The crystal structures of three of the salts were determined and on this basis, the reasons for the selectivity in the crystalline state are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.},
	keywords = {ABSTRACTION, ASYMMETRIC INDUCTION, CARBOXYLATE SALTS, CYCLIZATION, PHOTOCHEMISTRY, TRIPLETS, YANG PHOTOCYCLIZATION REACTION},
	isbn = {0040-4020},
	url = {<Go to ISI>://000089149100018},
	author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.}
}
@article {4766,
	title = {An investigation of the solid-state photochemistry of alpha-mesitylacetophenone derivatives: Asymmetric induction studies and crystal structure-reactivity relationships},
	journal = {Tetrahedron},
	volume = {56},
	number = {36},
	year = {2000},
	note = {ISI Document Delivery No.: 351GHTimes Cited: 10Cited Reference Count: 24},
	month = {Sep},
	pages = {6739-6751},
	type = {Article},
	abstract = {The photochemical conversion of a series of alpha-mesitylacetophenone derivatives into 2-indanols via delta-hydrogen abstraction has been investigated in the solid state. A correlation between solid-state reactivity and crystal structure has been established for this type of reaction. For the seven compounds whose crystal structures were determined, the average value of d (C=O...H distance) and L (C=O...CH3 distance) were 2.77+/-0.04 Angstrom and 3.42+/-0.06 Angstrom, and the value of omega (delta-H out of plane angle), d (C=O...H angle) and a (C-H...O angle) were 59+/-2 degrees, 80+/-7 degrees and 123+/-3 degrees, respectively. These parameters depended mainly on the magnitude of the deviation of the carbonyl group from the fully bisecting position over the mesityl ring, which ranged from 9-14 degrees in the case of in the solid state reactive ketones and approached 0 degrees for the unreactive compounds. Asymmetric induction studies were carried out by providing the reactants with carboxylic acid substituents to which ionic chiral auxiliaries were attached through salt formation with optically active amines. Irradiation of the salts (13 in total) in the crystalline state gave enantiomeric excesses of up to 90\%. The crystal structures of three of the salts were determined and on this basis, the reasons for the selectivity in the crystalline state are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.},
	keywords = {ABSTRACTION, ASYMMETRIC INDUCTION, CARBOXYLATE SALTS, CYCLIZATION, PHOTOCHEMISTRY, TRIPLETS, YANG PHOTOCYCLIZATION REACTION},
	isbn = {0040-4020},
	url = {<Go to ISI>://000089149100018},
	author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.}
}
@article {4508,
	title = {Asymmetric induction in the solid state photochemistry of an alpha-mesitylacetophenone derivative through the use of ionic chiral auxiliaries},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 15Cited Reference Count: 8},
	month = {Dec},
	pages = {8733-8736},
	type = {Article},
	abstract = {Irradiation in the crystalline state of salts formed between alpha-mesitylacetophenone-p-carboxylic acid and a variety of optically pure amines - the so-called {\textquoteright}ionic chiral auxiliary{\textquoteright} approach to asymmetric synthesis - leads to the corresponding 2-indanol in excellent yield and in high enantiomeric excess. X-Ray crystallography reveals the source of the enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, CRYSTAL, KETONES, PHOTOCHEMISTRY, REARRANGEMENTS},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200004},
	author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.}
}
@article {4508,
	title = {Asymmetric induction in the solid state photochemistry of an alpha-mesitylacetophenone derivative through the use of ionic chiral auxiliaries},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 15Cited Reference Count: 8},
	month = {Dec},
	pages = {8733-8736},
	type = {Article},
	abstract = {Irradiation in the crystalline state of salts formed between alpha-mesitylacetophenone-p-carboxylic acid and a variety of optically pure amines - the so-called {\textquoteright}ionic chiral auxiliary{\textquoteright} approach to asymmetric synthesis - leads to the corresponding 2-indanol in excellent yield and in high enantiomeric excess. X-Ray crystallography reveals the source of the enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, CRYSTAL, KETONES, PHOTOCHEMISTRY, REARRANGEMENTS},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200004},
	author = {Cheung, E. and Rademacher, K. and Scheffer, J. R. and Trotter, J.}
}
@article {4554,
	title = {Computational prediction of the enantioselectivity of a solid-state photoreaction},
	journal = {Organic Letters},
	volume = {1},
	number = {8},
	year = {1999},
	note = {ISI Document Delivery No.: 281QKTimes Cited: 8Cited Reference Count: 26},
	month = {Oct},
	pages = {1279-1281},
	type = {Article},
	abstract = {[GRAPHICS] To better understand the forces controlling chemical reactions in crystals, the absolute asymmetric photorearrangement of 4-m-chlorobenzyloxy-2-pyridone leading to the corresponding enantiomerically enriched (78\% ee) beta-lactam was modeled computationally using a flexible minilattice consisting of a central reactant and 20 nearest and 72 next-nearest neighbors. The computational results predicted a preference for formation of the (R,R)-enantiomer, and this was verified experimentally by absolute configuration correlation studies.},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, CRYSTAL LATTICES, FORCE-FIELD, MEDIA, MODEL, MOLECULAR MECHANICS, NUCLEIC-ACIDS, PHOTOCHEMISTRY, PROTEINS},
	isbn = {1523-7060},
	url = {<Go to ISI>://000085172100037},
	author = {Garcia-Garibay, M. A. and Houk, K. N. and Keating, A. E. and Cheer, C. J. and Leibovitch, M. and Scheffer, J. R. and Wu, L. C.}
}
@article {4505,
	title = {An ionic chiral auxiliary-induced regioselective and enantioselective Yang photocyclization reaction in the crystalline state},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 16Cited Reference Count: 19},
	month = {Dec},
	pages = {8729-8732},
	type = {Article},
	abstract = {cis-9-Decalyl aryl ketones undergo Yang photocyclization in solution to afford an approximately 1:1 mixture of two regioisomeric racemic cyclobutanols. In contrast, irradiation in the crystalline state in the presence of various ionic chiral auxiliaries leads to a single cyclobutanol in >98\% enantiomeric excess. X-Ray crystallography reveals the source of the regio-, diastereo- and enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, KETONES, ORGANIC-PHOTOCHEMISTRY, PHOTOCHEMISTRY, SOLID-STATE, Yang photocyclization},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200003},
	author = {Cheung, E. and Kang, T. and Raymond, J. R. and Scheffer, J. R. and Trotter, J.}
}
@article {4505,
	title = {An ionic chiral auxiliary-induced regioselective and enantioselective Yang photocyclization reaction in the crystalline state},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 16Cited Reference Count: 19},
	month = {Dec},
	pages = {8729-8732},
	type = {Article},
	abstract = {cis-9-Decalyl aryl ketones undergo Yang photocyclization in solution to afford an approximately 1:1 mixture of two regioisomeric racemic cyclobutanols. In contrast, irradiation in the crystalline state in the presence of various ionic chiral auxiliaries leads to a single cyclobutanol in >98\% enantiomeric excess. X-Ray crystallography reveals the source of the regio-, diastereo- and enantioselectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, CARBOXYLATE, KETONES, ORGANIC-PHOTOCHEMISTRY, PHOTOCHEMISTRY, SOLID-STATE, Yang photocyclization},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200003},
	author = {Cheung, E. and Kang, T. and Raymond, J. R. and Scheffer, J. R. and Trotter, J.}
}
@article {4506,
	title = {Linearly conjugated benzocyclohexadienone photochemistry in the solid state: ionic chiral auxiliary mediated asymmetric induction},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 16Cited Reference Count: 3},
	month = {Dec},
	pages = {8737-8740},
	type = {Article},
	abstract = {Asymmetric induction in the photochemistry of a linearly conjugated benzocyclohexadienone derivative has been achieved for the first time through the use of the solid state ionic chiral auxiliary method. Enantiomeric excesses as high as 70-80\% at reasonable conversions are readily attainable. Crystal structures for both reactant and product are reported. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, KETONES, PHOTOCHEMISTRY, REARRANGEMENT, [pi(a)(2)+sigma(a)(2)]},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200005},
	author = {Cheung, E. and Netherton, M. R. and Scheffer, J. R. and Trotter, J.}
}
@article {4506,
	title = {Linearly conjugated benzocyclohexadienone photochemistry in the solid state: ionic chiral auxiliary mediated asymmetric induction},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 16Cited Reference Count: 3},
	month = {Dec},
	pages = {8737-8740},
	type = {Article},
	abstract = {Asymmetric induction in the photochemistry of a linearly conjugated benzocyclohexadienone derivative has been achieved for the first time through the use of the solid state ionic chiral auxiliary method. Enantiomeric excesses as high as 70-80\% at reasonable conversions are readily attainable. Crystal structures for both reactant and product are reported. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ASYMMETRIC INDUCTION, KETONES, PHOTOCHEMISTRY, REARRANGEMENT, [pi(a)(2)+sigma(a)(2)]},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200005},
	author = {Cheung, E. and Netherton, M. R. and Scheffer, J. R. and Trotter, J.}
}
@article {4573,
	title = {The Norrish type II reaction in the crystalline state: Toward a better understanding of the geometric requirements for gamma-hydrogen atom abstraction},
	journal = {Tetrahedron},
	volume = {55},
	number = {4},
	year = {1999},
	note = {ISI Document Delivery No.: 159BRTimes Cited: 69Cited Reference Count: 58},
	month = {Jan},
	pages = {885-907},
	type = {Article},
	abstract = {By correlating the success or failure of the Norrish type II reaction for a series of compounds in the crystalline state with geometric data derived from X-ray crystallography (the so-called Crystal Structure-Solid State Reactivity Method), the distance and angular requirements for photochemical gamma-hydrogen atom abstraction have been established. These studies indicate that abstractions are preferred when the C=O ... H-gamma, distance is close to the sum of the van der Waals radii of hydrogen and oxygen (2.72 Angstrom), and that the gamma-hydrogen atom can deviate by as much as 50-60 degrees from the plane containing the oxygen n-orbital responsible for abstraction. Because molecular conformations and interatomic distances and angles can be calculated readily by using empirical force field methods, such data permit predictions to be made concerning the outcome of hypothetical Norrish type II processes. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ABSOLUTE ASYMMETRIC-SYNTHESIS, CONFORMATIONAL CONTROL, ENVIRONMENT, KETONES, METHODOLOGY, MOLECULES, PHOTOCHEMISTRY, PHOTOCYCLIZATION, SOLID-STATE, SPECTRA},
	isbn = {0040-4020},
	url = {<Go to ISI>://000078152400001},
	author = {Ihmels, H. and Scheffer, J. R.}
}
@article {4576,
	title = {The use of ionic chiral sensitizers in the crystalline state: application to the di-pi-methane photorearrangement of a benzonorbornadiene derivative},
	journal = {Tetrahedron Letters},
	volume = {40},
	number = {50},
	year = {1999},
	note = {ISI Document Delivery No.: 258FJTimes Cited: 8Cited Reference Count: 15},
	month = {Dec},
	pages = {8725-8728},
	type = {Article},
	abstract = {Simultaneous asymmetric induction and triplet-triplet energy transfer has been achieved in the di-pi-methane photorearrangement of a benzonorbornadiene derivative through the use of {\textquoteright}ionic chiral sensitizers{\textquoteright}. In this approach, salts formed between a reactant carboxylic acid and optically pure sensitizer amines are irradiated and the products monitored for optical activity following removal of the ionic auxiliary. In contrast to the results in solution, where only racemic products are formed, photolysis of the salts in the crystalline state leads to enantiomeric excesses as high as 91\% at 100\% conversion. (C) 1999 Elsevier Science Ltd. All rights reserved.},
	keywords = {ammonium salts, ASYMMETRIC INDUCTION, di-pi-methane, PHOTOCHEMISTRY, REARRANGEMENT},
	isbn = {0040-4039},
	url = {<Go to ISI>://000083827200002},
	author = {Janz, K. M. and Scheffer, J. R.}
}
@article {4165,
	title = {Crystal engineering for absolute asymmetric synthesis through the use of meta-substituted aryl groups},
	journal = {Tetrahedron Letters},
	volume = {38},
	number = {18},
	year = {1997},
	note = {ISI Document Delivery No.: WW958Times Cited: 14Cited Reference Count: 17},
	month = {May},
	pages = {3135-3138},
	type = {Article},
	abstract = {A significant tendency towards crystallization in chiral space groups has been found for 4-benzyloxy-2-pyridones whose phenyl groups are meta-substituted (m-Cl, m-Br, m-Me and m-OMe). Irradiation of single crystals of three of these materials leads to optically active beta-lactam derivatives in high chemical and optical yields via an allowed disrotatory electrocyclization. (C) 1997 Elsevier Science Ltd.},
	keywords = {DERIVATIVES, PHOTOCHEMISTRY, PHOTOREARRANGEMENT},
	isbn = {0040-4039},
	url = {<Go to ISI>://A1997WW95800004},
	author = {Wu, L. C. and Cheer, C. J. and Olovsson, G. and Scheffer, J. R. and Trotter, J. and Wang, S. L. and Liao, F. L.}
}
@article {4165,
	title = {Crystal engineering for absolute asymmetric synthesis through the use of meta-substituted aryl groups},
	journal = {Tetrahedron Letters},
	volume = {38},
	number = {18},
	year = {1997},
	note = {ISI Document Delivery No.: WW958Times Cited: 14Cited Reference Count: 17},
	month = {May},
	pages = {3135-3138},
	type = {Article},
	abstract = {A significant tendency towards crystallization in chiral space groups has been found for 4-benzyloxy-2-pyridones whose phenyl groups are meta-substituted (m-Cl, m-Br, m-Me and m-OMe). Irradiation of single crystals of three of these materials leads to optically active beta-lactam derivatives in high chemical and optical yields via an allowed disrotatory electrocyclization. (C) 1997 Elsevier Science Ltd.},
	keywords = {DERIVATIVES, PHOTOCHEMISTRY, PHOTOREARRANGEMENT},
	isbn = {0040-4039},
	url = {<Go to ISI>://A1997WW95800004},
	author = {Wu, L. C. and Cheer, C. J. and Olovsson, G. and Scheffer, J. R. and Trotter, J. and Wang, S. L. and Liao, F. L.}
}
@article {4054,
	title = {Determination of the absolute steric course of are enantioselective single crystal-to-single crystal photorearrangement},
	journal = {Journal of the American Chemical Society},
	volume = {119},
	number = {6},
	year = {1997},
	note = {ISI Document Delivery No.: WH326Times Cited: 27Cited Reference Count: 25},
	month = {Feb},
	pages = {1462-1463},
	type = {Article},
	keywords = {ASYMMETRIC-SYNTHESIS, PHOTOCHEMISTRY, PHOTODIMERIZATION, SOLID-STATE POLYMERIZATION},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1997WH32600039},
	author = {Leibovitch, M. and Olovsson, G. and Scheffer, J. R. and Trotter, J.}
}
@article {4054,
	title = {Determination of the absolute steric course of are enantioselective single crystal-to-single crystal photorearrangement},
	journal = {Journal of the American Chemical Society},
	volume = {119},
	number = {6},
	year = {1997},
	note = {ISI Document Delivery No.: WH326Times Cited: 27Cited Reference Count: 25},
	month = {Feb},
	pages = {1462-1463},
	type = {Article},
	keywords = {ASYMMETRIC-SYNTHESIS, PHOTOCHEMISTRY, PHOTODIMERIZATION, SOLID-STATE POLYMERIZATION},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1997WH32600039},
	author = {Leibovitch, M. and Olovsson, G. and Scheffer, J. R. and Trotter, J.}
}
@article {3973,
	title = {Phenyl[2,4,6-tris(1-methylethyl)phenyl]methanethione and 4-methoxyphenyl[2,4,6-tris(1-methylethyl)phenyl]methanethione},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {53},
	year = {1997},
	note = {ISI Document Delivery No.: XZ627Times Cited: 4Cited Reference Count: 15Part 9},
	month = {Sep},
	pages = {1257-1259},
	type = {Article},
	abstract = {The two title compounds, C22H28S and C23H30OS, respectively, have almost identical molecular structures, but different crystal structures. The two parts of each molecule are approximately perpendicular to each other, with S ...gamma H distances of 3.06 and 3.02 Angstrom, respectively, suitable for H-atom abstraction in photochemical reactions.},
	keywords = {PHOTOCHEMISTRY, PHOTOCYCLIZATION, STATE},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1997XZ62700041},
	author = {Fu, T. Y. and Scheffer, J. R. and Trotter, J.}
}
@article {3973,
	title = {Phenyl[2,4,6-tris(1-methylethyl)phenyl]methanethione and 4-methoxyphenyl[2,4,6-tris(1-methylethyl)phenyl]methanethione},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {53},
	year = {1997},
	note = {ISI Document Delivery No.: XZ627Times Cited: 4Cited Reference Count: 15Part 9},
	month = {Sep},
	pages = {1257-1259},
	type = {Article},
	abstract = {The two title compounds, C22H28S and C23H30OS, respectively, have almost identical molecular structures, but different crystal structures. The two parts of each molecule are approximately perpendicular to each other, with S ...gamma H distances of 3.06 and 3.02 Angstrom, respectively, suitable for H-atom abstraction in photochemical reactions.},
	keywords = {PHOTOCHEMISTRY, PHOTOCYCLIZATION, STATE},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1997XZ62700041},
	author = {Fu, T. Y. and Scheffer, J. R. and Trotter, J.}
}
@article {4121,
	title = {Photochemistry of 11,12-bis(aminomethyl)-9,10-dihydro-9,10-ethenoanthracene in solution and in the solid state},
	journal = {Liebigs Annalen-Recueil},
	number = {9},
	year = {1997},
	note = {ISI Document Delivery No.: XV554Times Cited: 5Cited Reference Count: 19},
	month = {Sep},
	pages = {1925-1929},
	type = {Article},
	abstract = {The photochemistry of 11,12-bis(aminomethyl)-9,10-dihydro-9,10-ethenoanthracene (4) was investigated in solution and in the solid state. Direct irradiation of 4 gave the singlet state photoproduct 5, whereas the triplet derived photoproduct could only be obtained by irradiating the bis(hydrochloride) salt of 4 in the presence of xanthen-9-one to give semibull-valene 6-(HCl)(2). Solid state photolysis of 4 resulted in the formation of the pyrrole derivative 7, which is likely due to steric interactions in the solid state.},
	keywords = {CRYSTALLINE, cyclizations, ethenoanthracenes, PHOTOCHEMISTRY, PYRROLES, solid-state chemistry},
	isbn = {0947-3440},
	url = {<Go to ISI>://A1997XV55400017},
	author = {Scheffer, J. R. and Ihmels, H.}
}
@article {3422,
	title = {3,3,18,18-tetramethyl-1,5,16,20-tetraoxadi-spiro[5.8.5.8]octacosane},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 0Cited Reference Count: 7Part 12},
	month = {Dec},
	pages = {2688-2690},
	type = {Article},
	abstract = {The centrosymmetric molecule, C28H52O4, contains an 18-membered ring, with two spiro-fused 1,3-dioxa six-membered rings.},
	keywords = {PHOTOCHEMISTRY},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500092},
	author = {Lewis, T. J. and Rettig, S. J. and Scheffer, J. R. and Trotter, J.}
}
@article {3422,
	title = {3,3,18,18-tetramethyl-1,5,16,20-tetraoxadi-spiro[5.8.5.8]octacosane},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 0Cited Reference Count: 7Part 12},
	month = {Dec},
	pages = {2688-2690},
	type = {Article},
	abstract = {The centrosymmetric molecule, C28H52O4, contains an 18-membered ring, with two spiro-fused 1,3-dioxa six-membered rings.},
	keywords = {PHOTOCHEMISTRY},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500092},
	author = {Lewis, T. J. and Rettig, S. J. and Scheffer, J. R. and Trotter, J.}
}
@article {3388,
	title = {ALPHA-POLYMORPHS AND GAMMA-POLYMORPHS OF DIMETHYL 9-CHLOROMETHYL-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TH717Times Cited: 0Cited Reference Count: 5Part 11},
	month = {Nov},
	pages = {2392-2395},
	type = {Article},
	abstract = {Two further polymorphic forms (alpha = P2(1) and gamma = P2(1)/c) of the title compound (C21H17ClO4) have been obtained and their crystal structures determined. The molecular geometries and photochemical behaviour are very similar to those of the previously described beta-form reported in the P2(1)/c space group [Chen, PoMtuluri, Scheffer \& Trotter (1993). Acta Cryst. B49, 905-909].},
	keywords = {PHOTOCHEMISTRY},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TH71700079},
	author = {Jones, R. and Rettig, S. J. and Trotter, J.}
}
@article {3500,
	title = {Tricyclo[22.2.2.2(11,14)]triaconta-11,13,24,26,27,29-hexaene-6,19-dione},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 0Cited Reference Count: 6Part 12},
	month = {Dec},
	pages = {2687-2688},
	type = {Article},
	abstract = {The title molecule, C30H40O2, contains a centrosymmetric 26-membered ring and has a conformation in which O...gamma-H distances are in the range 4.6-5.0 Angstrom, too long for H-atom abstraction, and in accord with the lack of photochemical reactivity in the solid state.},
	keywords = {PHOTOCHEMISTRY},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500091},
	author = {Rettig, S. J. and Scheffer, J. R. and Trotter, J. and Yang, J.}
}
@article {3500,
	title = {Tricyclo[22.2.2.2(11,14)]triaconta-11,13,24,26,27,29-hexaene-6,19-dione},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {51},
	year = {1995},
	note = {ISI Document Delivery No.: TT225Times Cited: 0Cited Reference Count: 6Part 12},
	month = {Dec},
	pages = {2687-2688},
	type = {Article},
	abstract = {The title molecule, C30H40O2, contains a centrosymmetric 26-membered ring and has a conformation in which O...gamma-H distances are in the range 4.6-5.0 Angstrom, too long for H-atom abstraction, and in accord with the lack of photochemical reactivity in the solid state.},
	keywords = {PHOTOCHEMISTRY},
	isbn = {0108-2701},
	url = {<Go to ISI>://A1995TT22500091},
	author = {Rettig, S. J. and Scheffer, J. R. and Trotter, J. and Yang, J.}
}
@article {3082,
	title = {IONIC CHIRAL HANDLE-INDUCED ASYMMETRIC-SYNTHESIS IN A SOLID-STATE NORRISH TYPE-II PHOTOREACTION},
	journal = {Tetrahedron-Asymmetry},
	volume = {5},
	number = {8},
	year = {1994},
	note = {ISI Document Delivery No.: PC678Times Cited: 22Cited Reference Count: 9},
	month = {Aug},
	pages = {1415-1418},
	type = {Article},
	abstract = {Irradiation of crystals of salts formed between 4-(2,4,6-triisopropylbenzoyl)benzoic acid (1a) and various optically active amines is shown to lead to optically active Norrish type II photoproducts in low to moderate enantiomeric excesses, a process in which the ammonium ion has acted as an {\textquoteright}{\textquoteright}ionic chiral handle.{\textquoteright}{\textquoteright} X-ray crystallography reveals that the salts crystallize with two independent, mirror image-related molecules of the benzophenone moiety in the asymmetric unit, and this is suggested to be the source of the low ees observed.},
	keywords = {2, 4, 6-TRIISOPROPYLBENZOPHENONES, INDUCTION, PHOTOCHEMISTRY, SALTS},
	isbn = {0957-4166},
	url = {<Go to ISI>://A1994PC67800004},
	author = {Koshima, H. and Maeda, A. and Masuda, N. and Matsuura, T. and Hirotsu, K. and Okada, K. and Mizutari, H. and Ito, Y. and Fu, T. Y. and Scheffer, J. R. and Trotter, J.}
}
@article {3082,
	title = {IONIC CHIRAL HANDLE-INDUCED ASYMMETRIC-SYNTHESIS IN A SOLID-STATE NORRISH TYPE-II PHOTOREACTION},
	journal = {Tetrahedron-Asymmetry},
	volume = {5},
	number = {8},
	year = {1994},
	note = {ISI Document Delivery No.: PC678Times Cited: 22Cited Reference Count: 9},
	month = {Aug},
	pages = {1415-1418},
	type = {Article},
	abstract = {Irradiation of crystals of salts formed between 4-(2,4,6-triisopropylbenzoyl)benzoic acid (1a) and various optically active amines is shown to lead to optically active Norrish type II photoproducts in low to moderate enantiomeric excesses, a process in which the ammonium ion has acted as an {\textquoteright}{\textquoteright}ionic chiral handle.{\textquoteright}{\textquoteright} X-ray crystallography reveals that the salts crystallize with two independent, mirror image-related molecules of the benzophenone moiety in the asymmetric unit, and this is suggested to be the source of the low ees observed.},
	keywords = {2, 4, 6-TRIISOPROPYLBENZOPHENONES, INDUCTION, PHOTOCHEMISTRY, SALTS},
	isbn = {0957-4166},
	url = {<Go to ISI>://A1994PC67800004},
	author = {Koshima, H. and Maeda, A. and Masuda, N. and Matsuura, T. and Hirotsu, K. and Okada, K. and Mizutari, H. and Ito, Y. and Fu, T. Y. and Scheffer, J. R. and Trotter, J.}
}
@article {3046,
	title = {IONIC CHIRAL HANDLE-INDUCED SOLID-STATE ASYMMETRIC-SYNTHESIS - ORIGIN OF THE ASYMMETRIC INDUCTION ELUCIDATED THROUGH ABSOLUTE-CONFIGURATION CORRELATION STUDIES},
	journal = {Tetrahedron Letters},
	volume = {35},
	number = {9},
	year = {1994},
	note = {ISI Document Delivery No.: MY726Times Cited: 19Cited Reference Count: 14},
	month = {Feb},
	pages = {1397-1400},
	type = {Article},
	abstract = {Irradiation of crystals of two salts formed between prochiral, photochemically reactive carboxylic acids and non-absorbing, optically active amines is shown to lead to optically active photoproducts in > 95\% enantiomeric excess, a process in which the ammonium ion has acted as an {\textquoteright}{\textquoteright}ionic chiral handle{\textquoteright}{\textquoteright}. Through a combination of X-ray crystallography and chemical correlations, the absolute configurations of the photoproducts and the salts from which they are derived were determined. This allowed the absolute steric course of the photorearrangements to be charted and the structural factors responsible for the high enantioselectivity to be identified.},
	keywords = {PHOTOCHEMISTRY, SALTS},
	isbn = {0040-4039},
	url = {<Go to ISI>://A1994MY72600024},
	author = {Gudmundsdottir, A. D. and Scheffer, J. R. and Trotter, J.}
}
@article {3046,
	title = {IONIC CHIRAL HANDLE-INDUCED SOLID-STATE ASYMMETRIC-SYNTHESIS - ORIGIN OF THE ASYMMETRIC INDUCTION ELUCIDATED THROUGH ABSOLUTE-CONFIGURATION CORRELATION STUDIES},
	journal = {Tetrahedron Letters},
	volume = {35},
	number = {9},
	year = {1994},
	note = {ISI Document Delivery No.: MY726Times Cited: 19Cited Reference Count: 14},
	month = {Feb},
	pages = {1397-1400},
	type = {Article},
	abstract = {Irradiation of crystals of two salts formed between prochiral, photochemically reactive carboxylic acids and non-absorbing, optically active amines is shown to lead to optically active photoproducts in > 95\% enantiomeric excess, a process in which the ammonium ion has acted as an {\textquoteright}{\textquoteright}ionic chiral handle{\textquoteright}{\textquoteright}. Through a combination of X-ray crystallography and chemical correlations, the absolute configurations of the photoproducts and the salts from which they are derived were determined. This allowed the absolute steric course of the photorearrangements to be charted and the structural factors responsible for the high enantioselectivity to be identified.},
	keywords = {PHOTOCHEMISTRY, SALTS},
	isbn = {0040-4039},
	url = {<Go to ISI>://A1994MY72600024},
	author = {Gudmundsdottir, A. D. and Scheffer, J. R. and Trotter, J.}
}
@article {7308,
	title = {CRYSTALLOGRAPHIC DETERMINATION OF THE PREFERRED GEOMETRY FOR INTRAMOLECULAR HYDROGEN-ATOM ABSTRACTION IN 1,8-CYCLOHEXADECANEDIONE},
	journal = {Molecular Crystals and Liquid Crystals},
	volume = {219},
	year = {1992},
	note = {ISI Document Delivery No.: JD451Times Cited: 6Cited Reference Count: 2410TH INTERNATIONAL CONF ON THE CHEMISTRY OF THE ORGANIC SOLID STATE ( ICCOSS 10 )JUL 07-12, 1991VANCOUVER, CANADACHEM INST CANADA, NAT SCI \& ENGN RES COUNCIL CANADA, PETR RES FUND, UNIV BRIT COLUMBIA, BRUKER SPECTROSPIN CANADA, CHEMAGNETICS, DOTY SCI, GORDON \& BREACH SCI PUBL},
	pages = {17-28},
	type = {Proceedings Paper},
	keywords = {CRYSTAL STRUCTURE-REACTIVITY, HYDROGEN ABSTRACTION GEOMETRY, II REACTIONS, MACROCYCLIC DIKETONE, MOLECULAR MECHANICS METHODOLOGY, NORRISH TYPE-II REACTION, PHOTOCHEMISTRY, REACTIVITY, RELATIONSHIPS, SOLID STATE ORGANIC PHOTOCHEMISTRY, STATE, TRANSFERS, TRANSITION STRUCTURES},
	isbn = {0140-6566},
	url = {<Go to ISI>://A1992JD45100002},
	author = {Lewis, T. J. and Rettig, S. J. and Scheffer, J. R. and Trotter, J.}
}
@article {7308,
	title = {CRYSTALLOGRAPHIC DETERMINATION OF THE PREFERRED GEOMETRY FOR INTRAMOLECULAR HYDROGEN-ATOM ABSTRACTION IN 1,8-CYCLOHEXADECANEDIONE},
	journal = {Molecular Crystals and Liquid Crystals},
	volume = {219},
	year = {1992},
	note = {ISI Document Delivery No.: JD451Times Cited: 6Cited Reference Count: 2410TH INTERNATIONAL CONF ON THE CHEMISTRY OF THE ORGANIC SOLID STATE ( ICCOSS 10 )JUL 07-12, 1991VANCOUVER, CANADACHEM INST CANADA, NAT SCI \& ENGN RES COUNCIL CANADA, PETR RES FUND, UNIV BRIT COLUMBIA, BRUKER SPECTROSPIN CANADA, CHEMAGNETICS, DOTY SCI, GORDON \& BREACH SCI PUBL},
	pages = {17-28},
	type = {Proceedings Paper},
	keywords = {CRYSTAL STRUCTURE-REACTIVITY, HYDROGEN ABSTRACTION GEOMETRY, II REACTIONS, MACROCYCLIC DIKETONE, MOLECULAR MECHANICS METHODOLOGY, NORRISH TYPE-II REACTION, PHOTOCHEMISTRY, REACTIVITY, RELATIONSHIPS, SOLID STATE ORGANIC PHOTOCHEMISTRY, STATE, TRANSFERS, TRANSITION STRUCTURES},
	isbn = {0140-6566},
	url = {<Go to ISI>://A1992JD45100002},
	author = {Lewis, T. J. and Rettig, S. J. and Scheffer, J. R. and Trotter, J.}
}
