@article {1147, title = {Calorimetric study on self-assembling of two kinds of monometallic nanoparticles in solution}, journal = {Journal of Thermal Analysis and Calorimetry}, volume = {81}, number = {3}, year = {2005}, note = {ISI Document Delivery No.: 962VGTimes Cited: 4Cited Reference Count: 233rd International Symposium on New Frontiers of Thermal Studies of MaterialsNOV 28-30, 2004Tsukuba, JAPANJSCTA, Univ Tsukuba, Grad Sch Pure \& Appl Sci, Soc Promot Calorimetry \& Thermal Anal, Ibaraki, Sci \& Technol Promot Fdn}, month = {Aug}, pages = {523-527}, type = {Proceedings Paper}, abstract = {Recently, we have reported a noble method of preparing Ag/Rh bimetallic nanoparticles with a pseudo-core/shell structure. We simply mix the dispersions of poly(N-vinyl-2-pyrrolidone)(PVP)-protected Ag and Rh nanoparticles in solution at room temperature. We found that the mixture of dispersions forms bimetallic nanoparticles in a pseudo-core/shell structure on standing. We call this process the {\textquoteright}self-assembling{\textquoteright} or {\textquoteright}self-organizing{\textquoteright}. In this study we seek for a thermodynamic driving force for this process by determining the enthalpy of the interaction among three pairs of nanoparticles by isothermal titration calorimetry (ITC). The results indicate that the interaction between each pair is strongly exothermic, and that among the pairs studied here the strength of the exothermic interaction is in the order of Ag/Pt://000231760500004}, author = {Kanemaru, M. and Shiraishi, Y. and Koga,Yoshikata and Toshima, N.} } @article {1290, title = {Spontaneous formation of core/shell bimetallic nanoparticles: A calorimetric study}, journal = {Journal of Physical Chemistry B}, volume = {109}, number = {34}, year = {2005}, note = {ISI Document Delivery No.: 959DQTimes Cited: 23Cited Reference Count: 41}, month = {Sep}, pages = {16326-16331}, type = {Article}, abstract = {We showed recently that low entropy core/shell structured nanoparticles form spontaneously from the physical mixture of a dispersion of Ag nanoparticles and that of another noble metal (Rh. Pd, or Pt) at room, temperature. Here we use isothermal titration calorimetry (ITC) and show that the initial step of such a spontaneous process is strongly exothermic. When the alcohol dispersion of poly(N-vinyl-2-pyrrolidone) (PVP)-protected Rh nanoparticles (average diameter 2.3 nm) was titrated into the alcoholic dispersion of PVP-protected Ag nanoparticles, a strong exothermic enthalpy change, Delta H. was observed: Delta H = -908 kJ/mol for Ag(S) nanoparticle (average diameter 10.8 nm) and -963 kJ/mol for Ag(L) nanoparticles (average diameter 22.5 nm). The strength of interaction increases in the order of Rh/Ag > Pd/Ag > Pt/Ag. This strong exothermic interaction is considered as a driving force to from low entropy bimetallic nanoparticles by simple mixing of two kinds of monometallic nanoparticles. We show also that exothermic interactions occur between a pair of noble metal nanoparticles themselves by using ITC.}, keywords = {ABSORPTION FINE-STRUCTURE, BINDING, CATALYTIC-ACTIVITY, CLUSTERS, CORE-SHELL, GOLD NANOPARTICLES, isothermal titration calorimetry, NANOPARTICLES, PD, REDUCTION, STRUCTURAL-ANALYSIS}, isbn = {1520-6106}, url = {://000231497500015}, author = {Toshima, N. and Kanemaru, M. and Shiraishi, Y. and Koga,Yoshikata} } @article {482, title = {Introduction: Nitric oxide chemistry}, journal = {Chemical Reviews}, volume = {102}, number = {4}, year = {2002}, note = {ISI Document Delivery No.: 542CKTimes Cited: 55Cited Reference Count: 31}, month = {Apr}, pages = {857-859}, type = {Editorial Material}, keywords = {CLUSTERS, NITROSYL COMPLEXES, RELEVANT}, isbn = {0009-2665}, url = {://000175025800001}, author = {Richter-Addo, G. B. and Legzdins,Peter and Burstyn, J.} } @article {539, title = {Microwave spectrum, geometry, and hyperfine constants of PdCO}, journal = {Journal of Physical Chemistry A}, volume = {106}, number = {24}, year = {2002}, note = {ISI Document Delivery No.: 563BXTimes Cited: 14Cited Reference Count: 48}, month = {Jun}, pages = {5803-5808}, type = {Article}, abstract = {The pure rotational spectrum of palladium monocarbonyl. PdCO, has been measured between 6000 and 24 000 MHz using a cavity pulsed jet Fourier transform microwave spectrometer. The molecules were prepared by laser ablation of Pd in the presence of CO contained in an Ar backing gas. The spectra of 15 isotopomers have been used to determine the molecular geometry from the measured rotational constants. Centrifugal distortion constants are in good agreement with those calculated from a literature harmonic force field. A nuclear quadrupole coupling constant and nuclear spin-rotation constant have been determined for Pd-105. Nuclear shielding parameters have been evaluated from the measured spin-rotation constant. The geometry is discussed with reference to theoretical data and to other molecules containing an M-CO bond.}, keywords = {CL, CLUSTERS, CO, MOLECULAR-STRUCTURE, MONOCARBONYLS, palladium, PURE ROTATIONAL SPECTRUM, SOLID ARGON, {BR}, isbn = {1089-5639}, url = {://000176235000007}, author = {Walker, N. R. and Hui, J. K. H. and Gerry, M. C. L.} } @article {4998, title = {Organometallic oxides: Oxidation of the cubane [(eta-C5R5)Cr(mu(3)-O)](4) and the structures and magnetic properties of the salts {[(eta-C5R5)Cr(mu(3)-O)](4)}{tcnq} and {[(eta-C5R5)Cr(mu(3)-O)](4)}{BF4}, journal = {Organometallics}, volume = {20}, number = {9}, year = {2001}, note = {ISI Document Delivery No.: 428DKTimes Cited: 5Cited Reference Count: 41}, month = {Apr}, pages = {1840-1848}, type = {Article}, abstract = {Differential pulse and current voltammetry for the cubane-like clusters [(eta -C5R5)Cr(mu (3)-O)](4) (R = H, Me; R-5 = H4Me) showed that [(eta -C5H4Me)Cr(mu (3)-O)](4) and [(eta -C5Me5)Cr(mu (3)-O)](4) were oxidized to {[(eta -C5R5)Cr(mu (3)-O)](4)}(+) and then to {[(eta -C5R5)Cr(mu (3)-O)](4)}(2+), but [(eta -C5H5)-Cr(mu (3)-O)](4) was oxidized only to {[(eta -C5H5)Cr(mu (3)-O)](4)}(+). Oxidation of [(eta -C5Me5)Cr(mu (3)-O)](4) (1) by AgBF4 or tcnq gave {[(eta -C5Me5)Cr(mu (3)-O)](4)}{BF4} (2) {[(eta -C5Me5)Cr(mu (3)-O)](4)}{tcnq} (3). It was shown by X-ray diffraction that the average Cr-Cr, Cr-O, and Cr-Cp* distances in 2 and 3 were 0.034(2), 0.007(5), and 0.02(1) Angstrom shorter than those in 1, respectively. Compounds 1 2, and 3 were antiferromagnetic., with similar intracluster exchange coupling constants, J (-262(23), -211(34), and -266(46) cm(-1), respectively). There was coupling between unpaired electrons on {[(eta -C5Me5)Cr(mu (3)-O)](4)}(+) and {tcnq}(-) in 3 at temperatures below 110 Ii.}, keywords = {<(ETA-C5H5)CR(MU-3-O)>4, CLUSTERS, COMPLEXES, CRYSTAL-STRUCTURES, MONONUCLEAR, REACTIVITY, SINGLE-MOLECULE MAGNETS, TCNQ, X-ray structure}, isbn = {0276-7333}, url = {://000168445800017}, author = {Allen, D. P. and Bottomley, F. and Day, R. W. and Decken, A. and Sanchez, V. and Summers, D. A. and Thompson, R. C.} } @article {4749, title = {Isotropic fluid phases of dipolar hard spheres}, journal = {Physical Review Letters}, volume = {84}, number = {1}, year = {2000}, note = {ISI Document Delivery No.: 271HJTimes Cited: 86Cited Reference Count: 28}, month = {Jan}, pages = {115-118}, type = {Article}, abstract = {Monte Carlo simulations are used to calculate the equation of state and free energy-of dipolar hard sphere fluids at low temperatures and densities. Evidence for the existence of isotropic-fluid-isotropic-fluid phase transitions is presented and discussed. Condensation in the dipolar hard sphere fluid is unusual in that it is not accompanied by large energy or entropy changes. An explanation of this behavior is put forward.}, keywords = {CLUSTERS, COMPUTER-SIMULATION, CONDENSATION, LIQUID, orientational order, SYSTEMS}, isbn = {0031-9007}, url = {://000084587900029}, author = {Camp, P. J. and Shelley, J. C. and Patey, G. N.} } @article {4613, title = {Excess partial molar enthalpy of 1-propanol in 1-propanol-NaCl-H2O at 25 degrees C: The effect of NaCl on molecular organization of H2O}, journal = {Journal of Physical Chemistry B}, volume = {103}, number = {15}, year = {1999}, note = {ISI Document Delivery No.: 189YNTimes Cited: 23Cited Reference Count: 26}, month = {Apr}, pages = {2981-2983}, type = {Article}, abstract = {Excess partial molar enthalpies of l-propanol, H-1p(E), in 1-propanol-NaCl-H2O were measured directly, accurately, and in small increments in mole fraction of 1-propanol, x(1P), at 25 degrees C in the range x(NaCl) < 0.04 x(NaCl) is the mole fraction of NaCl. The enthalpic interaction function, H-1P-1P(E), between l-propanol molecules was then evaluated. H-1P-1P(E) is a convenient, model-free measure for the intermolecular interaction in terms of enthalpy. The behavior of these thermodynamic quantities was compared with that of the binary 1-propanol-H2O. Based on the knowledge accumulated in our laboratory on the binary aqueous l-propanol, the effect of NaCl on H2O became apparent. Our tentative conclusions are that (1) a NaCl molecule "binds" to seven or eight molecules of H2O on dissolving into H2O, and (2) the reminder of bulk H2O away from solute NaCl is not affected and stays almost the same as pure H2O.}, keywords = {2-BUTOXYETHANOL, AQUEOUS SODIUM-CHLORIDE, CLUSTERS, EQUILIBRIUM, fluctuations, INTERMOLECULAR INTERACTIONS, LYSOZYME, SPECTROSCOPY, vibrational, VOLUMES, WATER}, isbn = {1089-5647}, url = {://000079934100023}, author = {Matsuo, H. and To, E. C. H. and Wong, D. C. Y. and Sawamura, S. and Taniguchi, Y. and Koga,Yoshikata} } @article {3936, title = {An extended mass range quadrupole for electrospray mass spectrometry}, journal = {International Journal of Mass Spectrometry and Ion Processes}, volume = {162}, number = {1-3}, year = {1997}, note = {ISI Document Delivery No.: XD007Times Cited: 10Cited Reference Count: 39}, month = {Mar}, pages = {121-127}, type = {Article}, abstract = {The mass range of a quadrupole mass spectrometer with an electrospray source has been increased from m/z 4000 to m/z 8585 by lowering the radio frequency of the quadrupole power supply from 1.00 MHz to 683 kHz. Unit mass resolution at m/z 5030 can be achieved. The sensitivity below m/z 3000 shows only small changes as expected from phase space arguments. Spectra of poly propylene glycol and soybean agglutinin with peaks in the range m/z 4000-7000 are described. (C) 1997 Elsevier Science B.V.}, keywords = {CLUSTERS, COMPLEXES, CONFORMATIONAL-CHANGES, DISSOCIATION, ELECTROSPRAY, high mass, IONIZATION-POTENTIALS, IONS, non-covalent, NONCOVALENT INTERACTIONS, PROTEINS, quadrupole mass spectrometer, SOYBEAN AGGLUTININ}, isbn = {0168-1176}, url = {://A1997XD00700011}, author = {Collings, B. A. and Douglas, D. J.} } @article {4138, title = {Optical detection of yttrium dicarbide, a {\textquoteright}{\textquoteright}T-shaped{\textquoteright}{\textquoteright} molecule}, journal = {Journal of Chemical Physics}, volume = {106}, number = {6}, year = {1997}, note = {ISI Document Delivery No.: WG307Times Cited: 13Cited Reference Count: 28}, month = {Feb}, pages = {2060-2066}, type = {Article}, abstract = {The yttrium dicarbide molecule, YC2, has been identified in the reactions of laser-ablated yttrium with methane and other small hydrocarbons under supersonic jet-cooled expansion conditions. A parallel-polarized electronic band system with origin at 12889.5 cm(-1) has been tentatively identified as an A(1)-<(X)over tilde (2)A(1)> transition of a {\textquoteright}{\textquoteright}T-shaped{\textquoteright}{\textquoteright} isomer where the Y atom is bonded to the side of a C-2 molecule. Weak vibronically induced perpendicular bands, representing Delta upsilon(3)=odd transitions, are also present. Extensive vibrational progressions in the excitation and the resolved fluorescence spectra have been analyzed to give the two lowest vibrational frequencies of the two electronic states: (X) over tilde (2)A(1), nu(2) (a(1))=561.1(+/-2.8 cm(-1)), nu(3) (b(2))=369.6 (+/-1.7 cm(-1)); excited A(1), nu(2)=494.5(+/-5.0 cm(-1)), nu(3)=331.6(+/-2.2 cm(-1)). No bands involving the C-C stretching vibration (nu(1),a(1)) have been found. The frequency of the vibration in the ground state indicates that the barrier to internal rotation of the C-2 group against the Y atom is quite high, but large anharmonic coupling between the nu(2) and nu(3) vibrations suggests that internal rotation is facilitated by excitation of the Y-C-2 stretohing vibration. (C) 1997 American lnstitute of Physics.}, keywords = {ACTIVATION, C-C BONDS, CLUSTERS, HYDROCARBONS, JET-COOLED SIC2, SPECTROSCOPY, TRANSITION-METAL ATOMS, YC2}, isbn = {0021-9606}, url = {://A1997WG30700002}, author = {Steimle, T. C. and Marr, A. J. and Xin, J. and Merer, A. J. and Athanassenas, K. and Gillet, D.} } @article {4001, title = {Towards inhibition of yellowing of mechanical pulps .2. Water-soluble catalysts for the hydrogenation of lignin model compounds}, journal = {Journal of Pulp and Paper Science}, volume = {23}, number = {5}, year = {1997}, note = {ISI Document Delivery No.: WY102Times Cited: 18Cited Reference Count: 32}, month = {May}, pages = {J200-J205}, type = {Article}, abstract = {Water-soluble, polymer-stabilized, colloidal rhodium is an effective catalyst for the hydrogenation of the aromatic rings of the lignin model compounds 4-propylphenol, 2-methoxy-4-propylphenol, and 1,2-dimethoxy-4-propylbenzene under extremely mild conditions (25 degrees C, 1 atm H-2) in a one-phase, aqueous ethanol medium. The water-soluble catalyst is prepared by reducing rhodium trichloride trihydrate with ethanol in the presence of polyvinylpyrrolidone (PVP) and triethylamine, The reactivity of various chromophore precursors in lignin toward hydrogenation catalyzed by water-soluble, colloidal rhodium follows the descending order of carbon-carbon double bond > aromatic ring in 4-propylphenol > carbonyl group and the aromatic rings in 2-methoxy-4-propylphenol and 1,2-dimethoxy-4-propylbenzene, The hydrogenation of 2-methoxy-4-propylphenol and 1,2-dimethoxy-4-propylbenzene is accompanied by some hydrogenolysis and removal of the OMe group.}, keywords = {aromatic compounds, aromatic groups, CARBON-MONOXIDE, CARBONYL, CATALYSTS, CHROMOPHORES, CLUSTERS, colloids, GROUPS, HIGH-YIELD PULPS, HYDROGENATION, HYDROGENOLYSIS, INHIBITION, LIGNIN, mechanical pulps, model compounds, water solubles, yellowing}, isbn = {0826-6220}, url = {://A1997WY10200002}, author = {Hu, Thomas Q. and James, Brian R. and Lee, C. L.} } @article {4001, title = {Towards inhibition of yellowing of mechanical pulps .2. Water-soluble catalysts for the hydrogenation of lignin model compounds}, journal = {Journal of Pulp and Paper Science}, volume = {23}, number = {5}, year = {1997}, note = {ISI Document Delivery No.: WY102Times Cited: 18Cited Reference Count: 32}, month = {May}, pages = {J200-J205}, type = {Article}, abstract = {Water-soluble, polymer-stabilized, colloidal rhodium is an effective catalyst for the hydrogenation of the aromatic rings of the lignin model compounds 4-propylphenol, 2-methoxy-4-propylphenol, and 1,2-dimethoxy-4-propylbenzene under extremely mild conditions (25 degrees C, 1 atm H-2) in a one-phase, aqueous ethanol medium. The water-soluble catalyst is prepared by reducing rhodium trichloride trihydrate with ethanol in the presence of polyvinylpyrrolidone (PVP) and triethylamine, The reactivity of various chromophore precursors in lignin toward hydrogenation catalyzed by water-soluble, colloidal rhodium follows the descending order of carbon-carbon double bond > aromatic ring in 4-propylphenol > carbonyl group and the aromatic rings in 2-methoxy-4-propylphenol and 1,2-dimethoxy-4-propylbenzene, The hydrogenation of 2-methoxy-4-propylphenol and 1,2-dimethoxy-4-propylbenzene is accompanied by some hydrogenolysis and removal of the OMe group.}, keywords = {aromatic compounds, aromatic groups, CARBON-MONOXIDE, CARBONYL, CATALYSTS, CHROMOPHORES, CLUSTERS, colloids, GROUPS, HIGH-YIELD PULPS, HYDROGENATION, HYDROGENOLYSIS, INHIBITION, LIGNIN, mechanical pulps, model compounds, water solubles, yellowing}, isbn = {0826-6220}, url = {://A1997WY10200002}, author = {Hu, Thomas Q. and James, Brian R. and Lee, C. L.} } @article {3644, title = {Benzynechromium tricarbonyl. Further synthetic studies}, journal = {Inorganica Chimica Acta}, volume = {251}, number = {1-2}, year = {1996}, note = {ISI Document Delivery No.: VX967Times Cited: 5Cited Reference Count: 21}, month = {Oct}, pages = {53-64}, type = {Article}, abstract = {{The thermolysis of Ru-3(CO)(11)[Ph(2)PC(6)H(5)Cr(CO)(3)] affords two isomers of the benzyne derivative Ru-3(CO)(7)(C6H4)[PPhC(6)H(5)Cr(CO)(3)](2) ((5) and (6)). The crystal structure of 5, previously determined, shows the phenyl groups are trans to the Ru-3-triangle; in 6 they are probably cis and on the same side of the Ru-3-triangle as the benzyne moiety. Os-3(CO)(11)[Ph(2)PC(6)H(5)Cr(CO)(3)] decomposes on heating to afford a benzyne derivative of a less common class Os-3(CO)(9)(C6H4)[PC6H5Cr(CO)(3)] (7), and an electron deficient molecule Os-3(CO)(8)(PhPC(6)H(4))[Ph(2)PC(6)H(5)Cr(CO)(3)] (8), in which the PhPC(6)H(4) moiety acts as a four-electron donor. The isopropylphosphine derivatives M(3)(CO)(11)[(Pr2PC6H5Cr)-P-i(CO)(3)] (M=Ru, Os), also undergo thermolysis to afford HRu3(CO)(8)[C6H4Cr(CO)(3)](PPr2i) (10), Ru(CO)(3)[(Pr2PC6H5Cr)-P-i(CO)(3)](2) (11), H2Os3(CO)(8)[(PrPC6H4Cr)-P-i(CO)(3)] (12) and H2Os3(CO)(8)[(PrPC6H4Cr)-P-i(CO)(3)][(Pr2PC6H5Cr)-P-i(CO)(3)] (13). Complex 10 is probably a benzynechromium tricarbonyl derivative with a Cr-Ru bond. The phosphines are trans in complex 11, a derivative of Ru(CO)(5). The structures of complexes 12 and 13 are closely related and the orthometalated [PC6H4Cr(CO)(3)] moiety is acting as a four-electron donor to the cluster. Crystal data: for 8 (C41H24CrO11Os3P2 . CH2Cl2): monoclinic}, keywords = {(BENZYNE)CHROMIUM TRICARBONYL, BENZYNE, carbonyl complexes, CHROMIUM COMPLEXES, cluster complexes, CLUSTERS, COMPLEXES, crystal structures, CRYSTAL-STRUCTURES, MOLECULAR-STRUCTURES, OSMIUM, osmium complexes, ruthenium complexes}, isbn = {0020-1693}, url = {://A1996VX96700009}, author = {Cullen, W. R. and Rettig, S. J. and Zhang, H. L.} } @article {3290, title = {THE REACTION OF PHSR(R=FC OR PH) WITH RU-3(CO)(12)}, journal = {Polyhedron}, volume = {14}, number = {19}, year = {1995}, note = {ISI Document Delivery No.: RU147Times Cited: 6Cited Reference Count: 28}, month = {Sep}, pages = {2653-2661}, type = {Article}, abstract = {{The reaction of SPh(2) with Ru-3(CO)(12) affords (mu-SR)(mu-eta(1); eta(6)-C6H5)Ru-3(CO)(8) (Ru-Ru)}, keywords = {BONDS, CLEAVAGE, CLUSTERS, COMPLEXES, NUCLEARITY, PHENYL, SULFIDES, TRICARBONYL}, isbn = {0277-5387}, url = {://A1995RU14700008}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {2772, title = {CRYSTAL AND MOLECULAR-STRUCTURES OF OS3(CO)9[MU(3)-(C5H4PR)FE(C5H4)] (R = FC OR PH), 2 MOLECULES WITH FE -] OS BONDS}, journal = {Journal of Organometallic Chemistry}, volume = {452}, number = {1-2}, year = {1993}, note = {ISI Document Delivery No.: LM427Times Cited: 12Cited Reference Count: 16}, month = {Jun}, pages = {97-103}, type = {Article}, abstract = {{The thermal reaction between Os3(CO)12 and Fe(C5H4)2PPh affords Os3(CO)9[mu3-(C5H4PPh)Fe(C5H4)](5b) (70\%) as the only major product. Heating a solution of Os3(CO)11(PFc2Ph) (FcH = (eta-C5H5)2Fe) in octane for 3 h gives the related molecule Os3(CO)9[mu3-(C5H4PFc)Fe(C5H4)] (5a) in low yield (5\%). The structures of 5a and 5b have been established by X-ray crystallography, revealing in each case that a closed Os3-triangle is capped on one face by the ferrocenyl phosphido moiety acting as an overall six-electron donor. It is bonded to the cluster via one phosphorus atom, one carbon atom from the C5H4 ring, and the iron atom. Two semibridging carbonyls are also present in each structure. Crystals of {mu3-[eta5-C5H4)2Fe]P[(eta3-C5H4)Fe(eta5-C5H5)]-Fe,P,P,C}Os3(CO)9 (5a) are triclinic, a 12.304(1), b 12.336(2), c 10.886(2) angstrom, alpha 115.38(2), beta 92.34(1), gamma 91.76(1)-degrees}, keywords = {CLEAVAGE, CLUSTERS, CONVERSION}, isbn = {0022-328X}, url = {://A1993LM42700016}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {7206, title = {CRYSTAL AND MOLECULAR-STRUCTURE OF AN UNUSUAL UNSYMMETRICAL ISOMER OF 1,2-OS3(CO)10(P(C6H5)[(ETA-C5H4)FE(ETA-C5H5)]2)2}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {9}, year = {1992}, note = {ISI Document Delivery No.: JW978Times Cited: 2Cited Reference Count: 17}, month = {Sep}, pages = {2329-2334}, type = {Article}, abstract = {{The reaction of Os3(CO)10(MeCN)2 with PFc2Ph (Fc = (eta-C5H4)Fe(eta-C5H5)) affords the unsymmetrical isomer of 1,2-Os3(CO)10(PFc2Ph)2, 2. Crystals of 2 are monoclinic}, keywords = {CLUSTERS, DERIVATIVES}, isbn = {0008-4042}, url = {://A1992JW97800002}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {7210, title = {FERROCYNE AND FERRODICYNE - PREPARATION AND STRUCTURES OF OS3(CO)9[MU-3-(C5H3)FE(C5H5)][MU-3-P(C5H4)FE(C5H5)], OS3(H)2(CO)8(PPRI2C5H2)FE(C5H2PPRI2)OS3(H)2(CO)8, AND OS3(CO)9[MU-3-C6H4][MU-3-P(C5H4)FE(C5H5)]}, journal = {Organometallics}, volume = {11}, number = {2}, year = {1992}, note = {ISI Document Delivery No.: HE298Times Cited: 32Cited Reference Count: 27}, month = {Feb}, pages = {928-935}, type = {Article}, abstract = {{The thermolysis of Os3(CO)11PPhFc2 affords Os3(CO)9[mu(3)-aryne][mu(3)-P(C5H4)Fe(C5H5)] (aryne = ferrocyne, (C5H3)Fe(C5H5) (2), benzyme, C6H4 (6)). Likewise the ferrodicyne Fe(C5H3)2 derivative Os3(H)2(CO)8-(PPr2iC5H2)Fe(C5H2PPr2i)Os3(H)2(CO)8 (3) is obtained from Os3(CO)11(PPr2iC5H4)Fe(C5H4PPr2i)Os3(CO)11. In 2 the ferrocyne moiety is a symmetrical four-electron donor to an open Os3P cluster; in 6 the benzyne is an unsymmetrical donor of two to four electrons to the open Os3P cluster. In 3 each aryne ring acts as an unsymmetrical four-electron donor to a closed Os3 cluster that is also coordinated to the PPr2i group of the other aryne ring. Crystal data for 2.0.5CH2Cl2: triclinic, P1BAR}, keywords = {BENZYNE, CLUSTERS, COMPLEXES, COORDINATION, CRYSTAL, MOLECULAR-STRUCTURE}, isbn = {0276-7333}, url = {://A1992HE29800064}, author = {Cullen, W. R. and Rettig, S. J. and Zheng, T. C.} } @article {7024, title = {ATOMIC MASS-SPECTROMETRY OF SOLID SAMPLES USING LASER ABLATION-ION TRAP MASS-SPECTROMETRY (LAITMS)}, journal = {Spectrochimica Acta Part B-Atomic Spectroscopy}, volume = {46}, number = {8}, year = {1991}, note = {ISI Document Delivery No.: GA509Times Cited: 27Cited Reference Count: 15}, pages = {1227-1235}, type = {Article}, abstract = {Laser ablation sampling inside the cavity of an ion trap was used to provide direct atomic mass spectrometric analysis of solid metal samples. An ion trap was designed such that a pulsed Nd:YAG laser beam was used to ablate sample pins inserted radially through the ring electrode. To demonstrate the potential of this method, atomic mass spectra were obtained for metal alloy samples.}, keywords = {CLUSTERS, QUADRUPOLE, SPECTROSCOPY}, isbn = {0584-8547}, url = {://A1991GA50900010}, author = {Gill, C. G. and Daigle, B. and Blades, M. W.} } @article {6973, title = {ORGANOMETALLIC OXIDES - PREPARATION AND PROPERTIES OF THE TETRAHEDRAL (TD) CUBANE [(ETA-C5(CH3)5)CR(MU-3-O)]4 AND COMPARISON WITH THE D2 [(ETA-C5H5)CR(MU-3-O)]4 AND D2D [(ETA-C5H4CH3)CR(MU-3-O)]4}, journal = {Organometallics}, volume = {10}, number = {4}, year = {1991}, note = {ISI Document Delivery No.: FG976Times Cited: 34Cited Reference Count: 41}, month = {Apr}, pages = {906-912}, type = {Article}, abstract = {{The cubane [(eta-C5(CH3)5)Cr(mu-3-O)]4 (3) was prepared by the reaction between (eta-C5(CH3)5)2Cr (4) and N2O (1:1 molar ratio) in toluene at 80-degrees-C. The structures of 3 and 4 have been determined by X-ray diffraction. 3: M(r) = 813.0, triclinic, P1BAR}, keywords = {(ETA-5-C5H5)4CR4O4, ANTI-FERROMAGNETIC COMPLEXES, CLUSTERS, METAL-METAL BONDS, MOLECULAR-STRUCTURES, TETRAHYDROFURAN}, isbn = {0276-7333}, url = {://A1991FG97600021}, author = {Bottomley, F. and Chen, J. H. and Macintosh, S. M. and Thompson, R. C.} }