Abstract A new oxidovanadium(V) complex, [VOL(OCH3)(CH3OH)] (1), was prepared from N’-(2-hydroxy-3-methoxybenzylidene)-3,5-dimethoxybenzohydrazide (H2L). Reaction of 1 with ethyl maltol (HL') in methanol afforded the new oxidovanadium(V) complex, [VOLL'] (2). The complexes were characterized by IR, UV and 1H NMR spectra. Structures of the complexes were further confirmed by single crystal X-ray determination. The V ions in the complexes are octahedral. The hydrazone ligands coordinate to V through the phenolate O, imino N, and enolate O. The ethyl maltolate ligand coordinates to V through the carbonyl and hydroxy oxygens. Both complexes show effective antibacterial activity against B. subtilis, S. aureus and P. aeruginosa. Thermogravimetric analysis was also performed. Graphical Abstract

中文翻译：

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具有抗菌活性的N'-(2-羟基-3-甲氧基亚苄基)-3,5-二甲氧基苯甲酰肼衍生的氧化钒(V)配合物的合成、表征和单晶X射线结构

摘要 以N'-(2-羟基-3-甲氧基亚苄基)-3,5-二甲氧基苯甲酰肼(H2L)为原料制备了一种新型氧化钒(V)配合物[VOL(OCH3)(CH3OH)](1)。1 与乙基麦芽酚 (HL') 在甲醇中反应得到新的氧化钒 (V) 络合物 [VOLL'] (2)。配合物通过红外、紫外和 1H 核磁共振光谱表征。通过单晶X射线测定进一步证实了配合物的结构。配合物中的 V 离子是八面体的。腙配体通过苯酚 O、亚氨基 N 和烯醇 O 与 V 配位。麦芽糖酸乙酯配体通过羰基和羟基氧与 V 配位。两种复合物均显示出对枯草芽孢杆菌、金黄色葡萄球菌和铜绿假单胞菌的有效抗菌活性。还进行了热重分析。图形概要