Abstract
A number of oxomolybdenum (VI) and (IV) complexes with potentially tridentate ONS donor Schiff bases of S-benzyl and S-methyl dithiocarbazates with salicylaldehyde have been synthesized. The Mo(VI) complexes are cis-dioxo, MoO2L (where L= H2L1 and H2L2) with one coordination site available for substrate binding. The Mo(IV) complexes, MoOL, are derived from the corresponding Mo(VI)-dioxo complexes by oxo abstraction with PPh3. The complexes were characterized by elemental analysis, UV, IR and 1H NMR spectroscopy, magnetic susceptibility measurement, molar conductivities in solution and by cyclic voltammetry. Two of the complexes MoO2L1 and MoO2L2 were crystallographically characterized. The structures reveal that the molybdenum acceptor center is present in a distorted octahedral NO4S donor environment.
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