@article {377,
	title = {Cyclohexadienyl niobium complexes and arene hydrogenation catalysis},
	journal = {Organometallics},
	volume = {21},
	number = {23},
	year = {2002},
	note = {ISI Document Delivery No.: 612WDTimes Cited: 6Cited Reference Count: 45},
	month = {Nov},
	pages = {5047-5054},
	type = {Article},
	abstract = {Hydrogenolysis of (R)[P2N2]NbCH2SiMe3 (where (R)[P2N2] = RP(CH2SiMe2NSiMe2CH2)(2)PR; R = cyclohexyl, Cy, or phenyl, Ph) in benzene or toluene causes hydride addition to the aromatic solvent resulting in the formation of the pi-bonded complexes (R)[P2N2]Nb(eta(5)-C6H7) (R = Cy, 1; R = Ph, 2) and (R)[P2N2]Nb(eta(5)-C7H9) (R = Cy, 3; R = Ph, 4) in benzene and toluene, respectively. Performing the hydrogenation at a higher pressure of 29 atm at room temperature causes the catalytic hydrogenation of benzene to cyclohexane as determined by NMR spectroscopy and GC-MS analysis. The hydrogenation of toluene to methylcyclohexane can also be performed, but the turnover frequency is considerably lower. Examination of the solid residues from the high-pressure hydrogenations indicates the formation of the pi-bonded complexes 1 and 2. The additionof 29 atm of H-2 to these cyclohexadienyl derivatives in benzene or toluene, however, shows no hydrogenation products, indicating these species are not catalytically active.},
	keywords = {AROMATIC-HYDROCARBONS, BOND, CHEMISTRY, CRYSTAL-STRUCTURE, HOMOGENEOUS HYDROGENATION, LIGANDS, TANTALUM DIHYDRIDE},
	isbn = {0276-7333},
	url = {<Go to ISI>://000179097700024},
	author = {Fryzuk,Michael D. and Kozak, C. M. and Bowdridge, M. R. and Patrick, B. O.}
}
@article {6965,
	title = {CATALYTIC ASYMMETRIC HYDROGENATION OF IMINES - USE OF RHODIUM(I)/PHOSPHINE COMPLEXES AND CHARACTERIZATION OF RHODIUM(I)/IMINE COMPLEXES},
	journal = {Inorganic Chemistry},
	volume = {30},
	number = {26},
	year = {1991},
	note = {ISI Document Delivery No.: GX615Times Cited: 100Cited Reference Count: 29},
	month = {Dec},
	pages = {5002-5008},
	type = {Article},
	abstract = {{An in situ Rh(I)(P-P) catalyst formed from [Rh(NBD)Cl]2 and cycphos (P-P = 1,2-bis(diphenylphosphino)-1-cyclohexylethane) effects asymmetric hydrogenation of some commercially important and model imines in 1:1 benzene/methanol under 1000-1500 psig H2 from -25 to +25-degrees-C; a maximum of 91\% ee is obtained for ArC(Me) = NCH2Ph (Ar = 4-MeOC6H4) in the presence of iodide cocatalyst at -25-degrees-C. Two [Rh(diphos)(imine)2]BF4 complexes have been isolated (diphos = 1,2-bis(diphenyl-phosphino)ethane): imine 8 = 6,7-dimethoxy-1-methyl-3,4-dihydroisoquinoline (complex 11) or imine 4 with Ar = 2-MeOC6H4 (complex 16). Complex 11 crystallizes in the triclinic system, space group P1BAR, with a = 12.564 (1) angstrom},
	keywords = {ACETOPHENONE, HOMOGENEOUS HYDROGENATION, RHODIUM-PHOSPHINE COMPLEXES, SYSTEMS},
	isbn = {0020-1669},
	url = {<Go to ISI>://A1991GX61500027},
	author = {Becalski, A. G. and Cullen, W. R. and Fryzuk,Michael D. and James, Brian R. and Kang, G. J. and Rettig, S. J.}
}
