Reactions of metallodithiolate ligand with palladium dichloride bearing monophosphine or diphosphine
摘要:
Reaction of metallodithiolate ligand Ni(bme-dach*) [bme-dach*=N,N'-bis(mercaptoethyl)-1,4-diazacyclohexane] with Pd[P(4-C6H4CH3)(3)](2)Cl-2 in the presence of NH4PF6 yielded a heterobimetallic complex {Ni(bme-dach*)Pd[P(4-C6H4CH3)(3)](2))}[PF6](2) (1) in 43% yield. However, reaction of Ni(bme-dach*) with Pd(dppm)Cl-2 [dppm = 1,1-bis(diphenylphosphino)methane] resulted in the formation of a mononuclear Pd complex [Pd(dppm)(2)][PF6](2) (2) via dissociation between Pd-P bonds. Moreover, reaction of Ni(bme-dach*) with Pd(dppv)Cl-2 [dppv = cis-1,2-bis(diphenylphosphino)ethylene] in the presence of NH4PF6 afforded an expected product [Ni(bme-dach*)Pd(dppv)]}[PF6](2) (3) in 80% yield as well as an unexpected product {Ni(bme-dach*)[Pd(dppv)Cl](2)}[PF6](2) (4) as a byproduct. The new complexes 1 and 3 were characterized by elemental analysis, H-1 NMR and P-31{H-1) NMR spectroscopy. In addition, the structures of the complexes 1-4 were confirmed by single crystal X-ray diffraction analysis. (C) 2017 Elsevier Ltd. All rights reserved.