Reaction of phosphorus trichloride and arsenic trichloride with transition-metal ion Schiff-base complexes

Abstract

NN′-Ethylenebis(salicylideneiminato)metal(II) complexes (M^IIsalen) where the metal ion is cobalt(II), nickel(II), or copper(II), and also the Schiff base ligand, react with phosphorus trichloride and arsenic trichloride to yield cyclic derivatives. In the Schiff-base complexes the essentially square planar stereochemistry of the metal ion produces tetrahedral [cobalt(II), copper(II)] or octahedral [nickel(II)] environments after reaction with phosphorus or arsenic trichloride. These systems have been characterised by magnetic measurements, and u.v. and i.r. spectroscopy.