@article {936,
	title = {Iodide effects in transition metal catalyzed reactions},
	journal = {Dalton Transactions},
	number = {21},
	year = {2004},
	note = {ISI Document Delivery No.: 865WTTimes Cited: 16Cited Reference Count: 153},
	pages = {3409-3419},
	type = {Review},
	abstract = {The unique properties of I- allow it to be involved in several different ways in reactions catalyzed by the late transition metals: in the oxidative addition, the migration, and the coupling/reductive elimination steps, as well as in substrate activation. Most steps are accelerated by I- (for example through an increased nucleophilicity of the metal center), but some are retarded, because a coordination site is blocked. The "soft" iodide ligand binds more strongly to soft metals (low oxidation state, electron rich, and polarizable) such as the later and heavier transition metals, than do the other halides, or N- and O-centered ligands. Hence in a catalytic cycle that includes the metal in a formally low oxidation state there will be less tendency for the metal to precipitate ( and be removed from the cycle) in the presence of I- than most other ligands. Iodide is a good nucleophile and is also easily and reversibly oxidized to I-2. In addition, I- can play key roles in purely organic reactions that occur as part of a catalytic cycle. Thus to understand the function of iodide requires careful analysis, since two or sometimes more effects occur in different steps of one single cycle. Each of these topics is illustrated with examples of the influence of iodide from homogeneous catalytic reactions in the literature: methanol carbonylation to acetic acid and related reactions; CO hydrogenation; imine hydrogenation; and C-C and C-N coupling reactions. General features are summarised in the Conclusions.},
	keywords = {ASYMMETRIC HYDROGENATION, BETA-KETO-ESTERS, CARBON-MONOXIDE, DETECT SPECIES PRESENT, HIGHLY ENANTIOSELECTIVE HYDROGENATION, METHANOL CARBONYLATION, OXIDATIVE-ADDITION, PARAHYDROGEN INDUCED, polarization, QUATERNARY ONIUM SALTS, REDUCTIVE ELIMINATION},
	isbn = {1477-9226},
	url = {<Go to ISI>://000224735600001},
	author = {Maitlis, P. M. and Haynes, A. and James, Brian R. and Catellani, M. and Chiusoli, G. P.}
}
@article {4547,
	title = {SYNTHESIS, STRUCTURE AND HYDROGENATION OF ETA-3-BENZYL DIPHOSPHINE COMPLEXES OF RHODIUM AND IRIDIUM},
	journal = {Journal of Organometallic Chemistry},
	volume = {445},
	number = {1-2},
	year = {1993},
	note = {ISI Document Delivery No.: KR221Times Cited: 30Cited Reference Count: 39},
	month = {Feb},
	pages = {245-256},
	type = {Article},
	abstract = {{The preparation of(COD)Rh(eta3-CH2Ph) is described starting from [(COD)Rh]2(mu-Cl)2 by the addition of either Zn(CH2Ph), or Mg(CH2Ph)2(THF)2. The addition of the bulky chelating diphosphines tBu2P(CH2)3PtBu2, iPr2P(CH2)3PiPr2, iPr2P(CH2)2PiPr2, iPr2PCH2PiPr2 and Cy2PCH2PCy2 to (COD)Rh(eta3-CH2Ph) yields the coordinatively unsaturated, four-coordinate rhodium complexes of the form P2Rh(eta3-CH2Ph). Iridium complexes of the form P2Ir(eta3-CH2Ph)(where P2 = tBu2P(CH2)3PtBu, and iPr2P(CH2)3PiPr2) can be prepared from [P2Ir]2(mu-Cl), and Zn(CH2Ph)2 or Mg(CHPh)2(THF)2. Reaction of the benzyl complexes with H-2 (1 atM) yields binuclear hydride derivatives of varying composition depending on the chelate ring size of the coordinated diphosphine. For the diphosphines with only a single methylene in the backbone, binuclear hexahydride complexes are formed in which the diphosphine is binucleating. The X-ray structure of {iPr2P(CH22)3PiPr2}Rh(eta3-CH2Ph) shows a square planar geometry about rhodium with alternating single and double bonds in the eta3-coordinated benzyl fragment. Crystals of (1,3-bis(diiso-propylphosphino)propane}rhodium(eta3-benzyl) are monoclinic},
	keywords = {BINUCLEAR, BRIDGING ALKENYL, CATALYTIC-HYDROGENATION, CHEMISTRY, DIHYDROGEN, Hydrides, OXIDATIVE-ADDITION, RAY CRYSTAL-STRUCTURE, REACTIVITY, RHRE(CO)4(PH2PCH2PPH2)2},
	isbn = {0022-328X},
	url = {<Go to ISI>://A1993KR22100035},
	author = {Fryzuk,Michael D. and McConville, D. H. and Rettig, S. J.}
}
