Cs. Browning et al., SYNTHESIS, CHARACTERIZATION AND REACTIVITY OF BINUCLEAR PALLADIUM(I)BIS(DIPHENYLPHOSPHINO)AMINE COMPLEXES, Inorganica Chimica Acta, 254(2), 1997, pp. 329-338
The binuclear Pd(I) complex [Pd-2(mu-dppa)(2)(CH3CN)(2)][BF4](2) (1),
where dppa is the bridging diphosphine ligand bis(diphenylphosphino)am
ine, was prepared by the reaction of [Pd(dppa)(2)][BF4](2) and 1/2 equ
iv. of [Pd-2(dba)(3)]. The acetronitrile ligands in complex 1 are read
ily displaced by other ligands. Substitution of one or both of the ace
tronitrile ligands of the dimer 1 with Cl-, Br-, I-, (CN)(-) and PPh(3
) is described. P-31 NMR and mass spectral data for the complexes are
reported. The single crystal X-ray structures of the binuclear complex
es, [Pd-2(mu-dppa)(2)(PPh(3))(THF)][BF4]. 4THF, [Pd-2(mu-dppa)(2)Cl-2]
. 3CH(3)CN have been determined. Attempts to react the binuclear compl
ex [Pd-2(mu-dppa)(2)I-2] with ligands capable of bridging the Pd-Pd bo
nd (CO, SO2 and HgCl2) were successful.