W0025

A Novel Monoxovanadium(V) Complex with Tridentate Schiff Base Ligand. S.-X. Liu^a,b, S. Gao^b, J.W. Yao^a and J.A.K.Howard^a, ^a Dept. of Chem., Univ. of Durham, Durham DH1 3LE, U.K., ^b Dept. of Chem., Fuzhou Univ., Fuzhou, Fujian 350002, China

A novel monooxovanadium(V) complex with tridentate Schiff base ligand, VO(C₁₈H₁₂N₂O₂)(OC₂H₅), was synthesized and structurally characterized by X-ray diffraction at 150K. The interest in the coordination chemistry of vanadium has considerably increased[1]. Recently, novel mono- and binuclear monooxovanadium(V) complexes containing tridentate Schiff base ligand with ONO donors or hexadentate Schiff base ligand with ONOONO donors have been synthesized and structurally characterized by IR, Raman, UV, NMR spectra, cycle voltammetry measurements and X-ray diffraction in our group[2, 3, 4]. The deep red crystal of the title compound is monoclinic with space group P 2₁/c. The vanadium atom in the title complex has a distorted square-pyramidal configuration with [V^VO(ONO)(O)] type, the equatorial plane is formed by the three donor atoms ( O(1), O(2), and N(1) ) of the fully deprotonated tridentate ligand and an oxygen atom (O(3)) of alkoxide group, bond distances of V(1)-O(1) (phenolate), V(1)-O(2) (carboxylate), V(1)-O(3) (alkoxide) and V(1)-N(1) being 1.858(2), 1.934(3), 1.755(3) and 2.098(3) Å, respectively, bond angles of O(2)-V(1)-O(1) and N(1)-V(1)-O(3) being 144.8(1) and 150.7(1). The oxo oxygen atom is at the vertex with V=O bond of 1.591(3) Å.

References

[1]. Cornman, C. R., Colpas, G. J., Hoeschele, J. D., Kampf, J. and Pecoraro, V. L., J. Am. Chem. Soc., 1992, 114, 9925-9933.

[2] Liu, S.-X. and Gao, S., Polyhedron, 1998, 17, 81-84.

[3] Liu, S.X. and Gao, S., to be published at Inorg. Chim. Acta.

[4] Gao, S., Weng, Z.-Q., Liu, S.-X., to be published at Polyhedron.