Hydrothermal Synthesis and Crystal Structure of a Novel Catena Co(Ⅱ) Complex Bridged by Biphenyl- 2,2′-dicarboxylate Divalent Anion

摘要

The title complex, [Co2（bpdc）2（bim）4]n（bpdc=biphenyl-2,2′-dicarboxylate dianion, bim=benzimidazole）, was synthesized in a aqueous solution and its crystal structure was determined by means of X-ray diffraction. There are two different coordinated Co（Ⅱ） centers in the complex. The Co1 center has a deformed trigonal-bipyramidal geometry, while the Co2 center possesses a tetrahedral geometry. In addition, the two different coordination modes of bpdc ligands act as two kinds of bridges to link Co1 and Co2, resulting in a catena chain.