Reactions of low-valent metal complexes with fluorocarbons. Part XVII. Tertiary arsine–nickel complexes

Abstract

Treatment of L₄Ni [L = PhAsMe₂, L₂=o-C₆H₄(AsMe₂)₂] with tetrafluoroethylene or trifluoroethylene gives the stable compounds [graphic omitted] and [graphic omitted], respectively. Chloro- and bromo-trifluoroethylene react with (PhMe₂As)₄Ni to afford the vinyl compounds (PhMe₂As)₂Ni(CF:CF₂)X (X = Cl or Br). Similarly, 1,1-dichloro-2,2-difluoroethylene and 1,2-dichloro-1,2-difluoroethylene gave (PhMe₂As)₂Ni(CCl:CF₂)Cl and (PhMe₂As)₂Ni(CF:CFCl)Cl, respectively, the latter being a mixture of cis- and trans-vinyl isomers. Hexafluorobuta-1,3-diene reacts with (PhMe₂As)₄Ni to give (PhMe₂As)₂[graphic omitted]. The complex [o-C₆H₄(AsMe₂)₂][graphic omitted], prepared from 1,5-C₈H₁₂[graphic omitted], reacts with (CF₃)₂CO and with (CF₃)₂CNH to form the five-membered ring compounds [o-C₆H₄(AsMe₂)₂] [graphic omitted] (X = O or NH). Bis-(π-2-methylallyl)nickel and tetrafluoroethylene react to form a complex containing two C₂F₄ groups per nickel atom.