@article {5080,
	title = {Location of the fluoride ion in tetrapropylammonium fluoride silicalite-1 determined by H-1/F-19/Si-29 triple resonance CP, REDOR, and TEDOR NMR experiments},
	journal = {Journal of the American Chemical Society},
	volume = {123},
	number = {28},
	year = {2001},
	note = {ISI Document Delivery No.: 451LFTimes Cited: 48Cited Reference Count: 50},
	month = {Jul},
	pages = {6882-6891},
	type = {Article},
	abstract = {The location of the fluoride ion in tetrapropylammonium fluoride silicalite-1 ([TPA]-F-[Si-MFI]), an as-synthesized siliceous zeolite with the MEI topology, has been unambiguously determined using solid-state NMR experiments alone. With the H-1 {\textendash}> Si-29 CP-INADEQUATE experiment, the 12 peaks in the highly resolved Si-29 MAS NMR spectrum of [TPA]-F-[Si-MFI] were assigned. Using these peak assignments it was possible to perform H-1/F-19/Si-29 triple resonance CP, REDOR, and TEDOR experiments to measure F-Si distances and thus locate the fluoride ion. It is covalently bonded to Si-9 in the [4(1)5(2)6(2)] cage of the zeolite framework and exchanges between two "mirror-related" Si-9 sites, making them equivalent on the NMR time scale. The importance of this result and the general applicability of the approach are discussed.},
	keywords = {3-DIMENSIONAL BONDING CONNECTIVITIES, 5-COORDINATE, CONTAINING OCTADECASIL, CROSS-POLARIZATION NMR, CRYSTAL-STRUCTURE, DETERMINATIONS, DISTANCE, MAS-NMR, NATURAL-ABUNDANCE, PROTON-ENHANCED NMR, SILICON, SOLID-STATE SI-29},
	isbn = {0002-7863},
	url = {<Go to ISI>://000169803000018},
	author = {Fyfe, C. A. and Brouwer, D. H. and Lewis, A. R. and Chezeau, J. M.}
}
@article {4548,
	title = {One-electron oxidation of paramagnetic chromium(II) alkyl complexes with alkyl halides: synthesis and structure of five-coordinate chromium(III) complexes},
	journal = {Journal of the Chemical Society-Dalton Transactions},
	number = {2},
	year = {1999},
	note = {ISI Document Delivery No.: 162JPTimes Cited: 18Cited Reference Count: 69},
	month = {Jan},
	pages = {147-154},
	type = {Article},
	abstract = {The reaction of square-planar, high-spin CrR[N(SiMe2CH2PPh2)(2)] (R = Me, CH2SiMe3) with alkyl halides (MeI, CF3CH2I, MeBr, PhCH2Cl) generates one-electron oxidation products Cr(R)X[N(SiMe2CH2PPh2)(2)], unusual examples of five-coordinate chromium(III) complexes. Cr(Me)Br[N(SiMe2CH2PPh2)(2)] and Cr(CH2SiMe3)Cl[N(SiMe2CH2PPh2)(2)] have structurally characterized. Alkylation of the latter complex with LiCH2SiMe3 gave a five-coordinate Cr(III) dialkyl complex Cr(CH2SiMe3)(2)[N(SiMe2CH2PPh2)(2)](2), which was structurally characterized as well. Attempts to isolate sterically unencumbered Cr(III) dialkyl (e.g., dimethyl) complexes resulted in decomposition. Addition of an excess of PhCH2Cl to {[(Ph2PCH2SiMe2)(2)N]Cr}(2)(mu-Cl)(2) resulted in halide-transfer to form CrCl2(TNF)[N(SiMe2CH2PPh2)(2)] in low yield. Reaction of the low-spin CrCp[N(SiMe2CH2PPh2)(2)] complex with PhCH2Cl, however, gave both Cr(Cp)(CH2Ph)[N(SiMe2CH2PPh2)(2)] and Cr(CP)Cl[N(SiMe2CH2CH2PPh2)(2)]. The five five-coordinate Cr(III) alkyl halide complexes do not polymerize ethylene at 60 degrees C and 1 atm; the dialkyl complex Cr(CH2SiMe3)(2)[N(SiMe2CH2PPh2)(2)] does catalyze polyethylene formation but is quickly deactivated. A discussion comparing the structural distortions observed in these five-coordinate high-spin d(3) Cr(III) complexes with those observed in the analogous low-spin d(6) Ir(III) complexes is presented.},
	keywords = {17-ELECTRON, 5-COORDINATE, ATOM TRANSFER-REACTIONS, CHEMISTRY, CRYSTAL-STRUCTURE, D6 ML5 COMPLEXES, NMR-SPECTROSCOPY, ORGANIC HALIDES, POLYMERIZATION, REACTIVITY},
	isbn = {0300-9246},
	url = {<Go to ISI>://000078342700010},
	author = {Fryzuk,Michael D. and Leznoff, D. B. and Rettig, S. J. and Young, V. G.}
}
@article {3933,
	title = {Mechanistic aspects of the oxidation of phosphines and related substrates by trans-Ru-VI(TMP)(O)(2); TMP equals dianion of 5,10,15,20-tetramesitylporphyrin},
	journal = {Journal of Molecular Catalysis a-Chemical},
	volume = {117},
	number = {1-3},
	year = {1997},
	note = {ISI Document Delivery No.: WN736Times Cited: 11Cited Reference Count: 34Proceedings of the 6th International Symposium on the Activation of Dioxygen and Homogeneous Catalytic OxidationAPR 14-19, 1996NOORDWIJKERHOUT, NETHERLANDSRoyal Netherlands Chem Soc},
	month = {Mar},
	pages = {91-102},
	type = {Proceedings Paper},
	abstract = {The stoichiometric oxidations of some Pt (p-X-C6H4)(3) compounds (X=OMe, Me, H, F, Cl and CF3), AsPh(3) and SbPh(3) by trans-Ru-VI(TMP)(O)(2) (1) in benzene solution generate the corresponding oxides and Ru-II(TMP)(L) species (L=P(p-X-C6H4)(3), AsPh(3), SbPh(3)). Stopped-flow kinetic data are consistent with a mechanism involving formation (within a k(1) step) of Ru-IV(TMP)(O)(OL) which then reversibly dissociates the OL ligand to generate Ru-IV(TMP)(O); this disproportionates to Ru-VI(TMP)(O)(2) and Ru-II(TMP), which forms Ru-II(TMP)(L). Delta H-1 double dagger values for the phosphine systems vary from 18 to 21 kJ mol(-1), increasing with decreasing electron density at the phosphorus, while Delta S-1 double dagger values become more favorable (-94 to -78 J mol(-1) K-1) with increasing molecular mass of the substituent. Preliminary kinetic data on the O-2-oxidations of the substrates catalyzed by (1) under 1 atm of air are presented.},
	keywords = {5-COORDINATE, DINITROGEN COMPLEXES, MECHANISM, models, OXYGEN-TRANSFER, phosphine oxidation, PORPHYRIN COMPLEX, REACTIVITY, ruthenium, RUTHENIUM PORPHYRIN},
	isbn = {1381-1169},
	url = {<Go to ISI>://A1997WN73600009},
	author = {Cheng, S. Y. S. and James, Brian R.}
}
