Two Mononuclear Molybdenum(VI) Oxo Complexes with Tridentate Hydrazone Ligands: Synthesis and Crystal Structures

Abstract

Reaction of [MoO2(Acac)2] (Acac = acetylacetonate) with two similar hydrazone ligands in methanol yielded two mononuclear molybdenum(VI) oxocomplexes with general formula [MoO2(L)(CH3OH)], where L = L 1 = (4 nitrophenoxy)acetic acid [1 (3 ethoxy 2 hydroxyphenyl)meth ylidene]hydrazide (H2L 1) and L = L2 = (4 nitrophenoxy)acetic acid [1 (5 bromo 2 hydroxyphenyl)meth ylidene]hydrazide (H2L 2). Crystal and molecular structures of the complexes were determined by single crystal X ray diffraction method. All investigated compounds were further characterized by elemental analysis and FT IR spectra. Single crystal X ray structural studies indicate that the hydrazone ligands coordinate to the MoO2 cores through enolate oxygen, phenolate oxygen, and azomethine nitrogen. The Mo atoms in both com plexes are in octahedral coordination. DOI: 10.1134/S1070328414020079 1 The article is published in the original.