Synthesis, Crystal Structures and Catalytic Property of Dioxidomolybdenum(VI) Complexes with Tridentate Hydrazones

Abstract

New dioxidomolybdenum(VI) complexes with the formula [MoO₂L(MeOH)], derived from N'-(5-chloro-2-hydroxybenzylidene)-2-methylbenzohydrazide (H₂L¹) and N'-(3,5-dichloro-2-hydroxybenzylidene)-2-methylbenzohydrazide (H₂L²) were prepared. Crystal and molecular structures of the complexes were determined by single crystal X-ray diffraction method. Both complexes were further characterized by elemental analysis and FT-IR spectra. Single crystal X-ray structural studies indicate that the hydrazones L¹ and L² coordinate to the MoO₂ cores through the enolate oxygen, phenolate oxygen and azomethine nitrogen. The Mo atoms in both complexes are in octahedral coordination. Catalytic properties for epoxidation of styrene by the complexes using PhIO and NaOCl as oxidant have been studied.