Synthesis and characterisation of <i>cis</i>-dioxomolybdenum(VI) Schiff base complexes derived from 2-benzoylpyridine

Abstract

<em>cis</em>-Dioxomolybdenum(VI) complexes of bi-, tri- and tetra-dentate Schiff bases derived from 2-benzoylpyridine and monoamines, such as, <em>p</em>-anisidine, <em>m-</em>phenetidine or <em>p</em>-toluidine, and diamines, viz., <em>o</em>-, <em>m</em>or <em>p</em>-phenylenediamine are reported. Reactions of the bi-, tri- and tetradentate Schiff bases with [MoO₂(acac)₂] in ethanol medium in 1: 1, 1: 2 and 1 : 2 molar ratios, respectively, yield diamagnetic molybdenum(VI) monometallic complexes of the composition, <em>cis</em>-[MoO₂(L)(OEt)₂] (where L= bidentate schiff base derived from monoamine) and the ligand bridged bimetallic complexes, <em>cis-</em>[Mo₂O₄(L¹ )(OEt)₄] (where L¹ = tridentate schiff base derived from <em>o- </em>or <em>m</em>-phenylenediamine or tetradentate schiff base with <em>p</em>-phenylenediamine). These complexes have been characterized by elemental analyses, molar conductances, IR, UViVis, ¹H NMR and CV studies.