Oxovanadium and dioxomolybdenum complexes: synthesis, crystal structure, spectroscopic characterization and applications as homogeneous catalysts in sulfoxidation
作者:Hadi Kargar、Azar Kaka-Naeini、Mehdi Fallah-Mehrjardi、Reza Behjatmanesh-Ardakani、Hadi Amiri Rudbari、Khurram Shahzad Munawar
DOI:10.1080/00958972.2021.1915488
日期:2021.5.19
oxovanadium and dioxomolybdenum Schiff base complexes, [VO(L)(OCH3)]n and [MoO2(L)(CH3OH)], were synthesized by treating an ONO donor Schiff base (H2L) derived by condensation of 3-ethoxysalicylaldehyde and nicotinic hydrazide with oxo and dioxo acetylacetonate salts of vanadium and molybdenum (VO(acac)2 and MoO2(acac)2), respectively. The synthesized ligand and complexes were characterized by FTIR, multinuclear
摘要 新的氧钒和二氧钼席夫碱配合物 [VO(L)(OCH 3 )] n和 [MoO 2 (L)(CH 3 OH)] 通过处理缩合得到的 ONO 供体席夫碱 (H 2 L)合成3-乙氧基水杨醛和烟碱酰肼分别与钒和钼的氧代和二氧代乙酰丙酮盐(VO(acac) 2和MoO 2 (acac) 2)。合成的配体和配合物通过 FTIR、多核 ( 1 H, 13C) NMR、元素和单晶 X 射线衍射分析。衍射研究表明,在这两种配合物中,中心金属离子周围的几何形状都是扭曲的八面体。合成化合物的理论计算采用DFT在B3LYP/Def2-TZVP理论水平下进行,与实验结果具有良好的相关性。此外,通过在乙醇中 30% H 2 O 2存在下氧化芳基和烷基硫化物来研究这两种配合物的催化效率。