title: Investigation on the complex of diperoxovanadate with picolinamide.
abstract: A novel diperoxovanadate complex NH(4)[OV(O(2))(2)(picolinamide)].H(2)O was synthesized from aqueous solution under physiological conditions. The solution structure of the complex was characterized by multinuclear ((1)H, (13)C, (14)N, and (51)V), variable temperature as well as two-dimensional (DOSY) NMR techniques in the interaction system of NH(4)VO(3)/H(2)O(2)/picolinamide at room temperature. The crystal structure of the complex was determined at 223K by single-crystal X-ray diffraction method. It belongs to the monoclinic space group P21/c with a=7.323(3)A, b=14.255(7)A, c=10.022(5)A, beta=99.524(9) degrees , V=1031.7(8)A(3), and Z=4. The crystal is composed of ammonium ions, picolinamide oxodiperoxovanadate(V) ions, and water molecules, which are held together by ionic and hydrogen bond forces. The species [OV(O(2))(2)(picolinamide)](-) is seven-coordinated with a distorted pentagonal bipyramidal geometry both in solution and in crystal.
authors.affiliation: Department of Physics, Fujian Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005, China.
authors.forename: Xianyong
authors.initials: X
authors.lastname: Yu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Shuhui
authors.initials: S
authors.lastname: Cai
authors.forename: Pinggui
authors.initials: P
authors.lastname: Yi
authors.forename: Zhong
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000577:Amides / Q000737:chemistry; D003460:Crystallization; D009682:Magnetic Resonance Spectroscopy; D010545:Peroxides / Q000737:chemistry*; D010848:Picolinic Acids / Q000737:chemistry*; D014638:Vanadates / Q000737:chemistry*
chemical_list: D000577:Amides; D010545:Peroxides; D010848:Picolinic Acids; C091767:diperoxovanadate; D014638:Vanadates; C003142:picolinamide