Synthesis of some phenyl-substituted stilbenediamines and their complexes with nickel(II)

Abstract

Seven meso-diamines, 1,2-bis-2-chloro-, 1,2-bis-3-chloro-, 1,2-bis-4-chloro-, 1,2-bis-4-fluoro-, 1,2-bis-3,4-di-chloro-, 1,2-bis-3-nitro-, and 1,2-bis-3-methylphenylethylenediamine have been prepared by reaction of the corresponding benzaldehyde with ammonium acetate and hydrolysis of the resulting N-benzoyl-N′-benzylidene-meso-1,2-diphenylethylenediamine with sulphuric acid. These diamines were each complexed with nickel(II) acetate, nitrate, perchlorate, and chloride to produce a variety of octahedral (blue, paramagnetic) or square planar (yellow diamagnetic) bis(diamine)nickel(II) salts which have been studied by i.r. and electronic spectroscopy and magnetic techniques.