Ditertiary arsine and phosphine compounds of nickel(II), palladium(II), and platinum(II)

Abstract

The preparation and properties of cis-dihalide complexes of the type M(Diarsine)X₂ and M(Diphosphine)X₂(where M = Ni, Pd, and Pt; Diarsine =o-phenylenebisdimethylarsine and Diphosphine = 1,2-bisdiphenylphosphinoethane) have been studied. Whereas the compounds Ni(Diphosphine) X₂(X = Cl, Br, l, and CNS) can be made by direct reaction between the nickel salt and the ligand, a new method of preparation was used to obtain the compounds Ni(Diarsine)X₂(X = Cl, Br, and l). This involves the action of gaseous HX on the substituted dicarbonyl Ni(Diarsine)(CO)₂. New compounds of palladium are reported and the first platinum derivatives of the type Pt(Diarsine)X₂ have been prepared by replacing phenyl cyanide from Pt(PhCN)₂X₂ with the chelate group. The properties and reactions of the complexes are described. Attempts to obtain penta-co-ordinate derivatives were not successful.