Spectroscopic, structural and theoretical studies of copper(II) complexes of tridentate NOS Schiff bases
作者:Temitope E. Olalekan、Adeniyi S. Ogunlaja、Bernardus VanBrecht、Gareth M. Watkins
DOI:10.1016/j.molstruc.2016.05.098
日期:2016.10
Abstract Two newly synthesized Schiff bases (L4 and L5) were derived from the condensation reaction of 2-(methylthiomethyl)anilines and 4-methoxysalicylaldehyde. Coordination complexes of these and four previously reported NOS Schiff bases, Cu(L1)2–Cu(L6)2, were synthesized via the reflux reaction of the various Schiff base ligands with CuCl2·2H2O. The compounds were characterized by means of elemental
摘要 2-(甲硫基甲基)苯胺与4-甲氧基水杨醛的缩合反应衍生出两种新合成的席夫碱(L4和L5)。这些和四种先前报道的 NOS 席夫碱的配位配合物,Cu(L1)2–Cu(L6)2,是通过各种席夫碱配体与 CuCl2·2H2O 的回流反应合成的。通过元素分析、FTIR 和 UV-Vis 对化合物进行表征。通过X射线衍射获得Cu(L1)2和Cu(L2)2的晶体结构。席夫碱通过酚氧、偶氮甲碱氮和硫醚硫与作为一元三齿配体的铜离子配位。配位配合物的微量分析与配体与铜金属离子的双摩尔结合一致。铜配合物的晶体结构证实了金属中心周围的八面体几何形状,并表明它们是单核的。磁矩值表明每个铜 (II) 轨道中存在一个孤电子,并证实了配合物的单核性。配位化合物的电子光谱由内配体、电荷转移和 d→d 带组成。通过使用 DFT 对配合物 (Cu(L1)2–Cu(L6)2) 进行的分子建模研究表明,配合物 Cu(L5)2