Synthesis of four new vic-dioximes and their nickel(II), cobalt(II), copper(II) and cadmium(II) complexes

Four unsymmetrical vic-dioximes: [L 1 H 2 ] N-(4-butylphenyl)amino-amphi-glyoxime, [L 2 H 2 ] N-(4-butylphenyl)amino-anti-glyoxime, [L 3 H 2 ] N-(4-phenylazophenyl)amino-amphi-glyoxime and [L 4 H 2 ] N-(4-phenylazophenyl)amino-anti-glyoxime have been prepared from amphi-chloroglyoxime, anti-chloroglyoxime, 4-butylaniline and 4-(phenylazo)aniline respectively. The complexes of these vic-dioximes with Ni II , Co II , Cu II and Cd II ions have been investigated. All are insoluble in common solvents. Their i.r. spectra and elemental analyses are given, together with mass and 1 H-n.m.r. spectra of the ligands