Synthesis, crystal structures of oxovanadium(V) complexes with hydrazone ligands and their catalytic performance for the styrene oxidation
作者:Yan Zhang、Ting Yang、Bo-Yang Zheng、Ming-Yang Liu、Na Xing
DOI:10.1016/j.poly.2016.09.060
日期:2017.1
Abstract Four new oxovanadium(V) complexes, [VO(aha)L1] (1), [VO(aha)L2] (2), [VO(aha)L3] (3), and [VO(aha)L4]·EtOH (4) (Haha = acetohydroxamic acid, H2L1 = 4-nitrophenyl 2-(2-hydroxybenzylidene)hydrazinecarboxylate, H2L2 = N′-(2-hydroxylbenzylidene)-4-methoxybenzohydrazide, H2L3 = N′-(2-hydroxylbenzylidene)-4-methylbenzohydrazide, HL4 = N′-(5-bromo-2-hydroxybenzylidene)-3-methyl benzohydrazide), have
摘要四种新的氧钒(V)络合物,[VO(aha)L1](1),[VO(aha)L2](2),[VO(aha)L3](3)和[VO(aha)L4] ·EtOH(4)(哈哈=乙酰氧肟酸,H2L1 = 4-硝基苯基2-(2-羟基苄叉基)肼甲酸甲酯,H2L2 = N'-(2-羟基苄叉基)-4-甲氧基苯甲酰肼,H2L3 = N'-(2-羟基苄叉基)已经制备了-4-甲基苯并肼,HL4 = N′-(5-溴-2-羟基亚苄基)-3-甲基苯并肼,并通过物理化学方法和X射线衍射对其结构进行了表征。配合物中的V原子处于八面体配位状态,其中ligand配体的三个供体原子和aha配体的去质子化羟基O原子定义了赤道面,aha配体的羰基O原子和一个氧代O原子占据轴向位置。配合物的晶体结构通过氢键稳定。此外,还通过苯乙烯(St)与苯甲醛(BzA)的反应(最大总周转数)研究了配合物1-4及其起始原料VO(acac)2的过氧化氧