1,721,050 research outputs found
The First Palladium (0) Complex with Only Secondary Phosphines as Ligands and Its Oxidative-Addition Reactions with CH2Cl2 and CHCl3, Giving the Thermally Stable Derivatives trans-[PdCl(R)(PBut2H)2] (R = CH2Cl, CHCl2)
No full textPd(PBut2H)3, obtained by reacting Pd-(eta5-C5H5)(eta3-C3H5) With PBut2H, oxidatively adds the C-Cl bond of methylene chloride and of chloroform, giving the thermally stable derivatives trans-[PdCl(CH2Cl)(PBut2H)2], (2) and trans-[PdCl(CHCl2)(PBut2H)2], (3), respectively. Complex 1 solutions deposit, by gentle warming, the known dimer [Pd(mu-PBut2)(PBut2H)]2
AN ELECTROCHEMICAL INVESTIGATION ON MONONUCLEAR AND DINUCLEAR COPPER(I) AMINOCARBONYL COMPLEXES
No full textIsolation and crystal and molecular structure of a rare example of a mononuclear organo-cuprate
No full textStepwise substitution of terminal and bridging phosphines in [Pd2(mu-P(t)Bu2)(mu-P(t)Bu2H)(P(t)Bu2H)2]BF4 and the reactivity of [Pd2(mu-P(t)Bu2)(PPh3)3]BF4
No full textThe dipalladium(I) cationic complex [Pd-2(mu-PBu2t)(mu-(PBu2H)-H-t)((PBu2H)-H-t)(2)]BF4 1, with a central [Pd-2(mu-PBu2t)](+) core binding two different types of (PBu2H)-H-t molecules, was treated with tertiary phosphines (PR3, R = Me, Et, Ph or C6H4OMe-2). The terminally bonded (PBu2H)-H-t molecules were substituted under mild conditions yielding the new derivatives [Pd-2(mu-PBu2t)(mu-(PBu2H)-H-t)(PR3)(2)]BF4, which still bear a bridging secondary phosphine. The latter can be substituted under more forcing conditions which allow the isolation of the persubstituted [Pd-2(mu-PBu2t)(PR3)(n)]BF4. The reactions of one of these derivatives, [Pd-2(mu-PBu2t)(PPh3)(3)]BF4, with CO, MeCN or isoprene giving, respectively, [Pd-2(mu-PBu2t)(PPh3)(3)L]BF4 (L = CO or MeCN) or [Pd-2(mu-PBu2t)(mu-eta(2);eta(2)-CH2=CHCMe=CH2)(PPh3)(2)]BF4 are also described
Boron Trifluoride-Promoted Activation of Water by Bis(tricyclohexylphosphine)palladium(0).
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Palladium(I) phosphido-bridged dinuclear derivatives with phosphite ligands
No full textNew mono-phosphido-bridged cationic derivatives of dipalladium(I) have been prepared by reacting [Pd-2(mu-PBu2t)(PPh3)(3)]BF4 (2)BF4, with P(OR)(3) (R=Me, Et, Ph). Under a large excess of the entering phosphite, all the PPh3 molecules terminally bonded to the central Pd-2(mu-PBu2t) core can be substituted, yielding [Pd-2(mu-PBu2t) {P(OR)(3)}(4)]BF4, [(4a)BF4, R = Me, (4b)BF4, R= Et and (4c)BF4, R=Ph]. The intermediate mixed-ligand complex [Pd-2(mu-PBu2t)(PPh3) {P(OPh)(3)}(2)]BF4, (5)BF4, was isolated in the reaction with P(OPh)(3). Moreover, the reactions of the new complexes with CO, isoprene and CS2 were investigated and compared to the corresponding reactions of the phosphine-substituted complexes
Isolation of the first neutral chromium formyl derivatives
No full textThe first neutral chromium formyl derivative Cp*Cr(CO)2[P(OMe)3](CHO) has been obtained as a cis-trans isomers mixture. Both of the isomers, which are remarkably thermally stable, slowly decompose in solution, at different rates, to give cis-Cp*Cr(CO)2 [P(OMe)3]H
Palladium(I) phosphido-bridged dinuclear derivatives with both phosphine and amine ligands
No full textA large excess of pyridine reacts with the dinuclear derivative of palladium(I) [Pd-2(mu-PBu2t)(PPh3)(3)]BF4 ((2)BF4) yielding firstly [Pd-2(mu-pBu(2)(t))(Py)(PPh3)(3)]BF4, ((4)BF4) and then [Pd-2(mu-PBu2t)(Py)(2)(PPh3)(2)]BF4, ((5)BF4) as a mixture of two isomers. The reactions of (5)BF4 with CO, isoprene and CS2 were investigated and compared to the corresponding reactions of its analogues containing only phosphines or phosphites as terminally bended Ligands; the higher lability of the pyridine molecules renders complex (Sb)BF4 a promising reagent which easily furnishes the 26 e(-) fragment Pd-2(mu-PBu2t)(PPh3)(2), with two adjacent unsaturated palladium centers
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