Preparation and structural characterization of nickel(II), cobalt(II), zinc(II) and tin(IV) complexes of the isatin Schiff bases of S-methyl and S-benzyldithiocarbazates
作者:M. Akbar Ali、A.H. Mirza、Hjh Junaidah Hj Abu Bakar、Paul V. Bernhardt
DOI:10.1016/j.poly.2010.11.016
日期:2011.3
which occupy sites close to the metal but too distant to be considered as true coordinate bonds. The crystal structures of the tin(IV) complexes [SnLPh2Cl]·nMeOH (L = isasme and isasbz; n = 0, 1) also show that the Schiff bases act as monoanionic bidentate NS chelating agents coordinating the tin(IV) ion via the azomethine nitrogen atoms and the thiolate sulfur atoms, the tin atom in each complex is
摘要通过X射线衍射确定了S-甲基二硫代咔唑(Hisasme)和S-苄基二硫代咔唑(Hisasbz)的靛蓝席夫碱的分子结构,及其通式为[ML2]·n(溶剂化物)的配合物[M = Co2 +, Ni 2+,Zn 2+;L = Hisasme或Hisasbz的阴离子形式;溶剂化物= DMF,DMSO; n = 1,2]和[Sn(L)Ph2Cl]·nMeOH(n = 0,1)已经合成,并通过各种物理化学技术和X射线衍射对其进行了表征。双配体络合物[Ni(isasbz)2]·2DMSO和[Co(isasme)2]·DMF具有六坐标,扭曲的八面体几何形状,其中两个带负电荷的三齿ONS配体通过金属离子经络配位。酰胺O原子,偶氮甲碱氮原子和硫醇盐硫原子。相比之下,[Zn(isasbz)2]·2DMF的晶体结构显示出四坐标扭曲的四面体几何结构,其中两个席夫碱通过偶氮甲碱氮原子和硫醇盐硫原子配位为NS二齿配体