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Synthesis, structure and properties of a series of scorpionate oxovanadium(IV)–carboxylate complexes by Zhang-Peng Li; Yong-Heng Xing; Yun-Zhu Cao; Xiao-Qing Zeng; Mao-Fa Ge; Shu-Yun Niu is a Chemistry article available to read on EtoBox.

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A series of oxovanadium(IV) complexes: TpVO(pzH)(2,4-Cl-C 6 H 3 -OCH 2 COO) (1), TpVO(pzH) 5) and Tp\*VO(pzH\*)(p-Cl-C 6 H 4 -COO) Á CH 3 OH (6) (Tp = hydrotris(pyrazolyl)borate, pzH = pyrazole, Tp\* = hydrotris(3,5-dimethylpyrazolyl)borate, pzH\* = 3,5-dimethylpyrazole) were synthesized and their crystal structures were determined by X-ray diffraction. In all the complexes, the vanadium ions are in a distorted-octahedral environment with a N 4 O 2 donor set. Hydrogen bonding interaction exists in each complex. Complexes 1 and 2 are hydrogen-bonded dimers. Dimeric units of 2 are connected to one another via weak inter-molecular C-HÁÁÁO interactions to form a 2D network on the bc-face. In 3-6 there exist intramolecular N-HÁÁÁO hydrogen bonds between the neutral pyrazole/3,5-dimethylpyrazole and the uncoordinated carboxyl oxygen atom. In addition, the catalytic activity of complex 2 in a bromination reaction in phosphate buffer with phenol red as a trap was evaluated by UV-Vis spectroscopy. Furthermore, the elemental analyses, IR spectra and thermal stabilities were recorded.

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Author

Zhang-Peng Li; Yong-Heng Xing; Yun-Zhu Cao; Xiao-Qing Zeng; Mao-Fa Ge; Shu-Yun Niu

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0277-5387)

Published

2009

Language

EN

Field

Chemistry (Physical Sciences)