Synthesis, Crystal Structure and Properties of a Novel Vanadium(Ⅴ) Oxoperoxo Complex Incorporating a Tridentate Hydrazone Ligand

A novel vanadium(V) oxoperoxo complex [VOO2(APTCH)(CH3OH)] (HAPTCH = 2-acetylpyridine thiophene-2-carboxylic hydrazone) has been synthesized and characterized by IR, TGA and X-ray single-crystal structure determination. The complex crystallizes in the monoclinic system, space group P2(1)/c with a = 11.232(2), b = 10.762(2), c = 112.613(3) angstrom, beta = 99.44(3)degrees, V = 1504.1(5) angstrom(3), D-c = 1.657 g.cm(-3), Z = 4, F(000) = 768, mu = 0.827 mm(-1), the final R = 0.0392 and wR = 0.1073 for 2266 observed reflections with I > 2 sigma(1). Single-crystal X-ray diffraction studies reveal that the vanadium(V) is coordinated by a tridentate ligand, methanol molecule and peroxo group to form a pentagonal-bipyramidal geometry. The crystal structure is stabilized by intermolecular hydrogen bonds of O-H center dot center dot center dot N and C-H center dot center dot center dot O.