Synthesis and reactivity of organometallic nickel(II) complexes obtained by oxidation of nickel(0) complexes with halogenated organic compounds
作者:Benedetto Corain、Giancarlo Favero
DOI:10.1039/dt9750000283
日期:——
Reaction of the complexes [Ni(dpb)2][dpb = 1,4-bis(diphenylphosphino)butane] and [Ni(dpp)2][dpp = 1,3-bis(diphenylphosphino)propane] with RCOX (R = Ph or Et; X = Cl or Br) in benzene, in molar ratio 1 : 1, at room temperature, produces nickel(II)-acyl complexes. The spontaneous decomposition of these species produces nickel(II) dihalogenodiphosphino-complexes, nickel(0) monocarbonyldiphosphino-complexes
The complex [Ni(CO)(dppb)2](dppb = Ph2P[CH2]4PPh2) undergoes a two-stage reaction with C2N2 in CH2Cl2, at room temperature. The first stage gives almost equivalent quantities of [Ni(CN)2(dppb)}2] and [Ni(CO)2(dppb)], whereas quantitative conversion of [Ni(CO)2(dppb)] into [Ni(CN)2(dppb)}2] and CO is obtained in the second stage. The complexes [Ni(CO)(dppb)P(OR)3}](R = Et or Ph) react in a similar