@article {1481,
	title = {Catalyst poisoning in catalyzed imine hydrogenation: A novel zwitterionic Rh(I)/o-hydroxy-substituted imine complex},
	journal = {Journal of Molecular Catalysis a-Chemical},
	volume = {257},
	number = {1-2},
	year = {2006},
	note = {ISI Document Delivery No.: 089DITimes Cited: 3Cited Reference Count: 38Marcazzan, Paolo Patrick, Brian O. James, Brian R.},
	month = {Sep},
	pages = {26-30},
	type = {Article},
	abstract = {During investigation of the homogeneous H-2-hydrogenation of the ketimine (o-HOC6H4)C(Me)=NCH2Ph catalyzed by the [Rh(COD)(PPh3)(2)]PF6 precursor in MeOH at ambient conditions, we have isolated [Rh{eta(4)-(C6H4O)C(-)(Me)=N(+)(H)CHPh}(PPh3)(2)]PF6 (3), an unusual zwitterionic Rh complex in which the imine is coordinated via the C-4 part of the o-hydroxy-arene moiety in a quinoid form; this tautomer is generated via proton transfer from the O-atom to the N-atom within the molecular, benzenoid form. Precipitation of 3 from the MeOH solution, even under H-2, causes sequestration of the Rh and complete suppression of the catalytic activity. (In a previously studied system with the corresponding, non-hydroxy-substituted ketimine, PhC(Me) = NCH2Ph, the Rh was sequestered as an inactive o-metalated species). The solid state structure of 3 is retained in CH2Cl2 solution, but in MeOH and Me2CO reversible loss of the ketimine generates the cis-[Rh(PPh3)(2)(solvent)(2)]PF6 species. (c) 2006 Elsevier B.V. All rights reserved.},
	keywords = {amine, BEHAVIOR, CATALYSIS, CATIONIC RHODIUM COMPLEXES, CHEMICALS, FINE, HYDROGENATION, HYDROLYSIS, imine complex, LIGAND, LIGANDS, OLEFINS, phosphine, RHODIUM COMPLEX, SCHIFF-BASES, SELECTIVE HYDROGENATION, zwitterion},
	isbn = {1381-1169},
	url = {<Go to ISI>://000240860100005},
	author = {Marcazzan, P. and Patrick, B. O. and James, Brian R.}
}
@article {440,
	title = {Synthesis and structure of dimeric Rh-bis(tertiary phosphine) complexes, exceptionally useful synthetic precursors},
	journal = {Comptes Rendus Chimie},
	volume = {5},
	number = {5},
	year = {2002},
	note = {ISI Document Delivery No.: 617WPTimes Cited: 12Cited Reference Count: 35},
	month = {May},
	pages = {373-378},
	type = {Article},
	abstract = {Removal of the MeOH and hydrogen from the known cis, trans, cis-Rh-111-dihydrido complexes [Rh(H)(2)(PR3)(2)(MeOH)(2)]PF6 (R= Ph, p-tolyl) results in formation of the dimeric species [Rh-2(PR3)(4)][PF6](2); X-ray analysis shows the complexes to be [(Ph3P)Rh(mu-PhPPh2)](2)(PF6](2) (and the p-tolyl analogue) containing bridged eta(6)-arene moieties, while H-1 and C-13 NMR data in CD2Cl2 provide evidence for Teta(4)-coordination of the arene within the dimer. In more strongly coordinating solvents, formation of cis-{Rh(PR3)(2)(solvent)(2)}PF6 is observed, while formation of [(PR3)(2)Rh(eta(6)-toluene)]PF6 is evident in toluene solution, and this exists in equilibrium with the bis(solvent) species in the presence, for example, of acetone or MeOH. At ambient conditions, none of the arene-containing complexes effected catalytic H-2-hydrogenation of toluene.},
	keywords = {arene complexes, CATIONIC RHODIUM COMPLEXES, EXCHANGE, imines, LIGANDS, METAL-COMPLEXES, OLEFINS, PHOSPHINE COMPLEXES, Rh complexes, SELECTIVE HYDROGENATION, X-ray structures},
	isbn = {1631-0748},
	url = {<Go to ISI>://000179384300004},
	author = {Marcazzan, P. and Ezhova, M. B. and Patrick, B. O. and James, Brian R.}
}
