New 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.
Palladium(I) phosphido-bridged dinuclear derivatives with phosphite ligands
LEONI, PIERO;PASQUALI, MARCO
1998-01-01
Abstract
New 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
