Synthesis and characterization of halogenocobalt(III) complexes of 3,8-dimethyl-5,6-benzo-4,7-diazadeca-3,7-diene-2,9-dione dioxime with substitute pyridines

Abstract

Cobalt(III) complexes of the type [Co(DODOHbzo) (<em>s</em>-py)X]CIO₄, where DODOHbzo = 3,8-dimethyl-5,6 benzo-4.7- diazadeca-3,7-diene-2,9-dione dioxime mono anion, <em>s-</em>py = a substituted pyridine, such as, nicotinamide, isonicotinamide, nicotinic acid or isonicotinic acid and X^- = CI^-, Br^- or J^-, have been synthesised and characterised by elemental analyses, conductivity studies, IR, ¹H NMR and UV-visible spectral data. The IR evidence suggests that it is the pyridine nitrogen that is involved in the coordination with cobalt(III), leaving amide and carboxylic acid groups free.