Haloperoxidase‐like Compounds: Synthesis,Structure and Properties of Two New Oxidovanadium‐Poly(pyrazolyl)borate‐Carboxylate Complexes |
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| Authors: | Zhang‐Peng Li Yong‐Heng Xing Prof Dr Chun‐Guang Wang Jing Li Yun‐Zhu Cao Xiao‐Qing Zeng Mao‐Fa Ge Shu‐Yun Niu |
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| Institution: | 1. Bioinorganic Laboratory, College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 116029, P. R. China;2. Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China |
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| Abstract: | Two new oxidovanadium (IV) complexes: TpVO(L1) ( 1 ) and Tp*VO(pzH*)(L2) ( 2 ) Tp = hydrotris(pyrazolyl)borate, HL1 = 5‐methyl‐1H‐pyrazole‐3‐carboxylic acid, Tp* = hydrotris(3,5‐dimethylpyrazolyl)borate, pzH* = 3,5‐dimethylpyrazole, HL2 = 5‐phenyl‐1H‐pyrazole‐3‐carboxylic acid] have been synthesized and characterized by elemental analysis and IR spectroscopy. The single‐crystal structures of the complexes shows that the vanadium ion is in a distorted octahedral environment with a N4O2 donor set in each complex. Additionally, hydrogen bonding interaction exits in both complexes. Interestingly, the molecules of 1 are held together to form a 1D hydrogen bonded polymer along the b axis, whereas complex 2 is a hydrogen bonded dimer. In addition, the catalytic activities of complexes 1 and 2 in bromination reactions in phosphate buffer with phenol red as a trap were evaluated primary by UV/Vis spectroscopy. Furthermore, ab initio calculations of complexes 1 and 2 were performed. |
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| Keywords: | Vanadium Haloperoxidases Poly(pyrazolyl)borates Carboxylates X‐ray diffraction |
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