Cai Ya-Jun, Wu Yuan-Yuan, Pan Fei, Peng Qi-An, Cui Yong-Ming
Acta Chim Slov. 2020 Sep;67(3):896-903.
Two new ethyl maltolato coordinated mononuclear oxidovanadium(V) complexes [VOLa(emt)]·DMF (1) and [VOLb(emt)] (2), where H2La = N'-(4-bromo-2-hydroxybenzylidene)-3-hydroxybenzohydrazide, H2Lb = N'-(4-bromo-2-hydroxybenzylidene)benzohydrazide, Hemt = ethyl maltol, have been synthesized and characterized on the basis of CHN elemental analysis, FT-IR and UV-Vis spectroscopy and powder XRD analysis. Structures of the complexes were further characterized by single crystal X-ray diffraction, which indicated that the V atoms in the complexes adopt octahedral coordination. The hydrazones behave as NOO tridentate ligands. The catalytic epoxidation properties on cyclooctene of the complexes were investigated.
合成了两种新的麦芽酚乙酯配位单核氧化钒（V）配合物[VOLa(emt)]·DMF（1）和[VOLb(emt)]（2），其中H2La = N'-(4-溴-2-羟基亚苄基)-3-羟基苯甲酰肼，H2Lb = N'-(4-溴-2-羟基亚苄基)苯甲酰肼，Hemt = 麦芽酚乙酯，并通过CHN元素分析、傅里叶变换红外光谱和紫外可见光谱以及粉末X射线衍射分析对其进行了表征。通过单晶X射线衍射进一步表征了配合物的结构，结果表明配合物中的V原子采用八面体配位。腙类作为NOO三齿配体。研究了这些配合物对环辛烯的催化环氧化性能。
