Hydrazones derived by the condensation of 4-methoxybenzoyl hydrazide with salicylaldehyde, o-hydroxyacetophenone and diacetylmonoxime. As ligands for cobalt (II & III)

Abstract

Reactions of salicylaldehyde 4-methoxybenzoyl hydrazone, (H₂)SMBHON, <em>o</em>-hydroxyacetophenone 4-methoxybenzoyl hydrazone, (H₂)OHAPMBHON, and diacetylmonoxime 4-methoxybenzoyl hydrazone (H₂)DAMMBHON with Co(OAc)2.4H₂O, CoCl₂.6H₂O, Co(NO₃)₂.6H₂O and Co(acac)₂.2H₂O under varied reaction conditions have been studied and many new mono-nuclear and di-nuclear complexes of cobalt(II)and cobalt(III) have been isolated. The complexes isolated have been characterised by elemental analyses, molar conductance values, magnetic susceptibilities and spectroscopic (UV-visible and IR) data. It has been concluded that formation of these completes involves tridentate ONO donor ligands either in the monobasic form or in the dibasic form.