Synthesis, Crystal Structure and Properties of Complex VO(C10H9NO3)(C13H10NO2)

作     者：MA Dong-sheng, GAO Shan **, HUO Li-hua, GAO Jin-sheng and ZHAO Jin-gui College of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150080, P. R. China 

作者机构：College of Chemistry and Chemical Engineering Heilongjiang University Harbin 150080 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究(英文版))

年 卷 期：2005年第21卷第1期

页      面：104-108页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：SupportedbytheNaturalScienceFundofHeilongjiangProvince(No.B00-07) theFundofEducationCommissionofHeilongjiangProvinceandtheScientificFundofRemarkableYounthsofHeilongjiangUniversity 

主　　题：Oxovanadium complex Hydroxamate complex Crystal structure Spectral property 

摘      要：Complex VO(C 10H 9NO 3)(C 13H 10NO 2)(C 10H 9NO 2- 3=N-salicylidene-L-alaninate, C 13H 10NO- 2=N-phenylbenzohydroxamate) was synthesized and characterized by means of elemental analysis, IR, UV, 1H NMR spectroscopies, cyclic voltammetry and single crystal X-ray diffraction. The complex crystallized in a monoclinic system with space group P2 1 and crystal cell parameters a=0.9720(1) nm, b=1.8274(2) nm, c=1.2542(1) nm, β=104.868(9)°, V=2.1532(4) nm3, M r=470.34, Z=2. The two oxygen atoms and the one nitrogen atom of the tridentate Schiff base ligand and the one oxime oxygen atom of the hydroxamate ligand coordinate to the vanadium atom, forming an equatorial plane, the two axial positions are respectively occupied by the oxygen atom of the oxovanadium and the carbonyl oxygen atom of the hydroxamate and the vanadium atom exhibits a distorted octahedral VO(ONO)(OO) coordination sphere. The 1H NMR spectrum suggests that the two isomers, endo and exo in a molar ratio of 1/1.7, coexist in the solution of the title complex in CDCl 3. There exists a quasi-reversible one-electron redox reaction corresponding to VⅤ/VⅥ couple in the three non-aqueous solvents, and the redox potential E 1/2 of the title complex substantially shifts in the direction of the positive voltage increase in the order: CH 2Cl 2CH 3CNDMF.