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Syntheses and Spectral Properties of Dinitrosylmolybdenum(0) and Dioxomolybdenum(VI) Complexes

1993; Oxford University Press; Volume: 66; Issue: 7 Linguagem: Inglês

10.1246/bcsj.66.1979

1348-0634

Mannar R. Maurya, C. Gopinathan,

Organometallic Compounds Synthesis and Characterization

Abstract Syntheses of dinitrosylmolybdenum(0) complexes of Schiff bases derived from salicylaldehyde, 5-chlorosalicylaldehyde, o-hydroxyacetophenone, and p-nitrobenzoylhydrazide have been carried out in one step by the reaction of [Mo(acac)2(NO)2] (acacH = acetylacetone) and the Schiff bases. The complexes are of the type [Mo(LH)2(NO)2] (LH2 = Schiff base) in which Schiff bases behave as monobasic bidentate ligands and coordinate to molybdenum through the azomethine nitrogen and enolic oxygen of the hydrazide moiety after deprotonation. Two geometrical isomers with nitrosyl groups trans to each other have been noticed in solution. Dioxomolybdenum(VI) complexes of the above Schiff bases have also been synthesized using [MoO2(acac)2] as precursor for comparison.