SYNTHESIS, SPECTRAL PROPERTIES AND REDOX BEHAVIOR OF CIS-DIOXO-MOLYBDENUM(VI) COMPLEXES WITH TRIDENTATE ARYLAZO LIGANDS

Molybdenum complexes of type [MoO(2)L] (2) [where H(2)L = 1-(2-hydroxy phenylazo)-2-hydroxynaphthalene or its substituted derivative] have be en isolated. They are deep red coloured, non-electrolytic and diamagne tic in nature and have been characterized by elemental analyses and sp ectroscopic techniques (electronic, IR, and IH NMR). They react with d ifferent Lewis bases (B) to yield [MoO(2)L(B)] (3) complexes. The redo x activity of complexes 2 were systematically examined by cyclic volta mmetry at a glassy carbon electrode in non-aqueous medium. All the com plexes show a one-electron reduction of quasi-reversible nature near - 0.6 V vs SCE.