Departamento de Química Inorgánica, Facultad de Química, Universidad Nacional Autónoma de México, C.U., Coyoacán, México, D.F. 04510, México.
Dalton Trans. 2010 Jul 21;39(27):6302-9. doi: 10.1039/c0dt00084a. Epub 2010 Jun 3.
Herein we report the synthesis, structural and spectroscopic characterization of coordination compounds with bis[2-(1H-benzimidazol-2-yl)phenyl]disulfide [bis-(2phSbz)] (1) and cobalt(II), zinc(II) and cadmium(II) halides (2-7). Their X-ray diffraction analyses showed that the metal ions present similar distorted tetrahedral structures, with the disulfide ligand coordinated through the imidazolic nitrogen atoms, forming a twisted eleven membered chelate ring. Structures of nickel(II) compounds 8 and 9, showed that the disulfide bond in the ligand was cleaved forming six membered chelates. In 8, the two ligands are sulfides, however in 9 one of them was oxidized to a sulfone. In both compounds the nickel(II) has a distorted square planar geometry and the sulfur atoms are in cis positions. The oxidation reaction of bis-(2phSbz) was performed in KMnO4/NaOH, giving the 2-(1H,3H-benzimidazolium-2-yl)-benzene sulfonate (10). The solid state structure of compounds 2-5 and 7-10 was determined by X-ray diffraction analyses.
在此，我们报告了具有双[2-(1H-苯并咪唑-2-基)苯基]二硫醚[双-(2phSbz)]（1）和钴(II)、锌(II)和镉(II)卤化物（2-7）的配位化合物的合成、结构和光谱特性。它们的 X 射线衍射分析表明，金属离子呈现相似的扭曲四面体结构，二硫醚配体通过咪唑氮原子配位，形成扭曲的十一元螯合环。镍(II)化合物 8 和 9 的结构表明，配体中的二硫键断裂形成六元螯合物。在 8 中，两个配体都是硫醚，而在 9 中，其中一个被氧化成砜。在这两种化合物中，镍（II）具有扭曲的正方形平面几何形状，硫原子处于顺式位置。双-(2phSbz)的氧化反应在 KMnO4/NaOH 中进行，得到 2-(1H,3H-苯并咪唑-2-基)-苯磺酸酯（10）。化合物 2-5 和 7-10 的固态结构通过 X 射线衍射分析确定。
