Synthesis and Characterization of Cobalt(II), Nickel(II) and Copper(II) Chloride Complexes with Bis[(diphenylphosphinyl)methyl] phenylphosphine Oxide and Bis[(diphenylphosphinyl)methyl]phosphinic Acid

A series of cobalt(II), nickel(II) and copper(II) chloride complexes with the tripode organophosphorous compounds: bis[(diphenylphosphinyl) methyl]phenylphosphine oxide (RPPh) and bis [(diphenylphosphinyl)methyl]phosphinic acid (RPOH) were studied. Complexes of the general stoichiometry [M(RPPh)s] [MC14] • 4H20 and fM(RPOH)Cl · nH20]m (M = Co(II), Ni(II) or Cu(II); n = 0 - 4, m = 1, 2 or more) were isolated. According to spectral and magnetic data, complexes with the RPPh ligand appear to have both an octahedral and a tetrahedral surrounding of the metal(II) ion. For the complexes [M(RPOH)Cl · nH20]m the electronic effect of the metal ion seems to be predominant. A tetrahedra<! surrounding for the cobalt(II) complex, an octahedral surrounding for the nickel(II) complex and a tetragonal distorted octahedral surrounding for the copper(II) complex has to be assumed