Acta Chim Slov. 2021 Jun;68(2):441-446.
Two oxidovanadium(V) complexes, [VOL1L] (1) and [VOL2L] (2) (L = ethyl maltolate), derived from the aroylhydrazones 4-bromo-N'-(2-hydroxy-5-methylbenzylidene)benzohydrazide (H2L1) and N'-(3,5-dibromo-2-hydroxybenzylidene)-4-methoxybenzohydrazide (H2L2), respectively, have been synthesized and characterized by elemental analysis, infrared and electronic spectroscopy. Structures of the complexes were further confirmed by single crystal X-ray determination. The V atoms in the complexes are coordinated by the ONO donor atoms of the aroylhydrazone ligand, OO donor atoms of the ethyl maltolate ligand, and one oxido O atom, forming octahedral coordination. The complexes function as effective olefin epoxidation catalysts with hydrogen peroxide as terminal oxidant and sodium hydrogen carbonate as a co-catalyst.
两个氧化钒(V)配合物，[VOL1L]（1）和[VOL2L]（2）（L = 乙基麦芽醇），分别由酰腙 4-溴-N'-(2-羟基-5-甲基苯亚甲基)苯甲酰肼（H2L1）和 N'-(3,5-二溴-2-羟基苯亚甲基）-4-甲氧基苯甲酰肼（H2L2）衍生而来，通过元素分析、红外和电子光谱进行了合成和表征。通过单晶 X 射线确定进一步证实了配合物的结构。配合物中的 V 原子由酰腙配体的 ON0 供体原子、乙基麦芽醇配体的 OO 供体原子和一个氧化氧原子配位，形成八面体配位。这些配合物是有效的烯烃环氧化催化剂，以过氧化氢为末端氧化剂，碳酸氢钠为共催化剂。
