A 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.
Palladium(I) phosphido-bridged dinuclear derivatives with both phosphine and amine ligands
LEONI, PIERO;PASQUALI, MARCO
1999-01-01
Abstract
A 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
