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    Acetalization and transacetalization reactions catalyzed by ruthenium, rhodium, and iridium complexes with (2-{{bis[3-(trifluoromethyl)phenyl]phosphino}methyl}-2-methylpropane-1,3-diyl}bis[bis[3-(trifluoromethyl)phenyl]phosphine] (MeC[CH2P(m-CF3C6H4)2]3)
    (Wiley-V C H Verlag Gmbh, 2001) Sülü, M; Venanzi, LM
    The complexes [RhCl(3 n)(MeCN)(n)(CF(3)triphos)](CF3SO3)(n) (n = 1, 2; CF(3)triphos = MeC[CH2P(m-CF3C6H4)(2)](3)) and [M(MeCN)(3) (CF(3)triphos)](CF3SO3)(n) (M = Ru, n = 2; M = Ir, n = 3) are catalyst precursors for some typical acetalization and transacetalization reactions. The activity of these complexes is higher than those of the corresponding species containing the parent ligand MeC[CH2P(C6H5)(2)](3)(Htriphos). Also the complexes [MCl3(tripod)] (tripod = Htriphos and CF(3)triphos) are active catalysts for the above reactions. The complex [RhCl2(MeCN)(CF(3)triphos)](CF3SO3) catalyzes the acetalization of benzophenone.
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    The ruthenium and iridium coordination chemistry of the tripodal ligand CH3C{CH2P(m-CF3-C6H4)2}3
    (Elsevier Science Sa, 1999) Sülü, M; Venanzi, LM
    The ruthenium(II) complexes [Ru(CF3CO2)(2)(CF(3)triphos)], [Ru-2(mu-Cl)(3)(CF(3)triphos)(2)]Cl, [RuH(CH3CN)(2)(CF(3)triphos)](CF3SO3) and [Ru(CH3CN)(3)(CF(3)triphos)](CF3SO3)(2) (CF(3)triphos = CH3C{CH2P(m-CF3C6H4)(2)}(3)) were prepared and characterized. The iridium complexes [Ir(COD)(CF(3)triphos)](+), [IrCl(CO)(CF(3)triphos)], [Ir(CO)(2)(CF(3)triphos)](+), [IrCl3(CF(3)triphos)] and [IrCl3-n(MeCN)(n)(CF(3)triphos)](CF3SO3)(n) (n = 1, 2 and 3) were also prepared and characterized. The coordination chemistries of these two elements with CF(3)triphos and with the unsubstituted ligand CH3C{CH2P(C6H5)(2)}(3) (Htriphos) are compared. It is shown that, relative to Htriphos, CF(3)triphos (a) stabilizes the iridium(I) relative to the iridium(III) oxidation state and (b) its cationic complexes are stronger Lewis acids. (C) 1999 Elsevier Science S.A. All rights reserved.
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    The synthesis of the tripodal phosphine CH3C{CH2P(m-CF3C6H4)2}3 and its rhodium coordination chemistry
    (Elsevier Science Sa, 1998) Sulu, M; Venanzi, LM; Gerfin, T; Gramlich, V
    The new tripodal phosphine CH3C{CH2P(m-CF2C6H4)(2)}(3), CF3PPP, was prepared by reacting CH3C(CH2Br)(3) with Li+P(m-CF3C6H4)(2)(-), the latter being best obtained by adding (Li+NPr2-)-Pr-i to PH(m-CF3C6H4)(2). The rhodium complexes [RhCl(CO)(CF3PPP)], [Rh(LL) (CF3PPP)](CF3SO3) (LL=2 CO or NBD), [RhX3(CF3PPP)], [RhX(MeCN)(2)(CF3PPP)](CF3SO3)(2) (X=H and Cl), [RhCl2(MeCN)(CF3PPP)] (CF3SO3) and [Rh(MeCN)(3)(CF3PPP)](CF3SO3)(3) were prepared and characterized. The X-ray crystal structure of [Rh(NBD)(CF3PPP)](CF3SO3) is reported. The lower oxygen sensitivity of the CF3PPP rhodium(I) complexes, relative to the corresponding species with the parent ligand CH3C(CH2PPh2)(3), is attributed to the higher effective nuclear charge on the metal centers caused by the presence of the six CF3 substituents on the terdentate phosphine. A similar effect may be responsible for the easier hydrolysis of the CF3PPP-containing, cationic rhodium(III) complexes relative to the corresponding compounds of the parent ligand. (C) 1998 Elsevier Science S.A.