Crystal structure of di-μ-methanolato-bis{[N′-(1-benzoylprop-1-en-2-yl)thiophene-2-carbohydrazidato-κ3O,N′,O′]oxidovanadium(V)}

Abstract

The neutral binuclear molecule of the title complex, [V2(C15H12N2O2S)2(CH3O)2O2], exhibits inversion symmetry and consists of two oxidovanadium(V) (VO)3+ fragments, each coordinated by a dianionic and O,N′,O′-chelating N′-(1-benzoylprop-1-en-2-yl)thiophene-2-carbohydrazidate ligand. The V5+ cations are bridged by two asymmetrically bonding methanolate ligands [V—O = 1.8155 (12) and 2.3950 (13) Å] originating from the deprotonation of the methanol solvent. The coordination sphere of the VV atom is distorted octahedral, with the equatorial plane defined by the three donor atoms of the thiophene-2-carbohydrazidate ligand and the O atom of a methanolate unit. The axial positions are occupied by the oxide group and the remaining methanolate ligand. The axially bound methanolate ligand shows a longer V—O bond length due to the trans influence caused by the tightly bonded oxide group. The packing of the complex molecules is dominated by dispersion forces.

Keywords

• crystal structure
• thiophene-2-carbohydrazide
• vanadium(V) complex
• dinuclear complex
• alkoxide bridging