New mononuclear dioxidomolybdenum(VI) complexes with hydrazone ligands: Synthesis, crystal structures and catalytic performance

被引:18
作者
Wang, Cong [1 ]
Xing, Na [1 ]
Feng, Wenjing [1 ]
Guo, Sihan [1 ]
Liu, Mingyang [1 ]
Xu, Yue [1 ]
You, Zhonglu [1 ]
机构
[1] Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Peoples R China
关键词
Hydrazone; Molybdenum complex; Crystal structure; Catalytic oxidation; Cyclohexane; TRANSITION-METAL-COMPLEXES; MOLYBDENUM(VI) DIOXO COMPLEXES; C-H BONDS; CYCLOHEXANE OXIDATION; SELECTIVE OXIDATION; HYDROCARBON OXIDATION; IRON COMPLEXES; DONOR; OXOMOLYBDENUM(VI); OXYGENATION;
D O I
10.1016/j.ica.2018.11.020
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Three new dioxomolybdenum (VI) complexes, [MoO2L1(MeOH)] (1), [MoO2L2(MeOH)] (2) and [MoO2L3(H2O)]center dot EtOH (3), where L-1, L-2 and L-3 are the dianionic form of N'-(2-hydroxybenzylidene)-3-methylbenzohydrazide, 4-bromo- N'-(2-hydroxybenzylidene)benzohydrazide and 2-bromo-N'-(2-hydroxy benzylidene) benzohydrazide, respectively, have been prepared and characterized by IR, UV-Vis and NMR spectra, as well as single crystal X-ray diffraction. The Mo atoms in the complexes are in octahedral coordination, with the ONO donor set of the hydrazone ligands, O atoms of the solvents, and two oxo groups. Crystals of the complexes are stabilized by hydrogen bonds of types O-H center dot center dot center dot N and O-H center dot center dot center dot O. Moreover, the catalytic properties of complexes 1-3 are compared in cyclohexane oxidation. It was found that sebacic acid and FeCl3 could promote the catalytic activities of the complexes.
引用
收藏
页码:625 / 635
页数:11
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