Oxidovanadium(IV) complexes with tridentate N-heterocycle ligands: Synthesis, structure, and efficient catalyst for cyclohexane oxidation to cyclohexanone

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• 作者：Zhi Dan Yan ; Na Xing ; ^{scarllet_na@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yan Zhang ; Xi Tong Ma ; Jian Song ; Xin Liu ; Yong Heng Xing ; ^{xingyongheng2000@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Oxidovanadium complexes ; Tridentate N-heterocyclic ligands ; Crystal structure ; Cyclohexane oxidation ; Catalyst
• 刊名：Polyhedron
• 出版年：2015
• 出版时间：14 December 2015
• 年：2015
• 卷：102
• 期：Complete
• 页码：600-608
• 全文大小：1802 K

文摘

A series of coordination oxidovanadium(IV) complexes: [VOSO₄ (bpz-eaT)]·C₄H₆O₄ (1), [VOSO₄(bpz-eaT)]·0.5(C₁₀H₁₈O₄) (2) and [VOSO₄ (bpz-eaT)]·C₅H₈O₄·CH₃CN (3) (bpz-eaT = 2,4-bis (3,5-dimethyl-1H-pyrazol-1-yl)-6-diethylamino-1,3,5-triazine) were synthesized in MeCN. All of the complexes are characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. The single-crystal X-ray diffraction analyses reveal that the vanadium atoms are six-coordinated in all complexes. In the study of Cyclohexane (Cy) oxidation, promoted by our complexes, the effects of the amount of H₂O₂ and HNO₃ were investigated. It was found that complex 3 exhibited the highest catalytic activity in MeCN at 9 h, 60 °C, which is the first oxidovanadium(IV) complex catalyst that we found can catalyze Cy produce more cyclohexanone (CyO) than cyclohexanol (CyOH) oxidated by H₂O₂.