A New Binuclear Cobalt(II) Complex Based on 1,3-Benzenedicarboxylic Acid and 2-(3-Pyridyl)benzimidazole

Abstract

A binuclear cobalt(II) complex, [Co2(H2O)4(3-PBIM)4(1,3-BDC)2]·2H2O (1,3-H2BDC = 1,3-benzenedicarboxylic acid, 3-PBIM = 2-(3-pyridyl)benzimidazole), has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystallographically independent cobalt atom is coordinated by four oxygen and two nitrogen donors in an octahedron geometry ([CoN2O4]). Two cobalt coordination units ([CoN2O4]) are linked together via four carboxyl oxygen atoms of two 1,3-BDC2− ligands, forming a dimetal unit ([CoN2O4]2). The extensive hydrogen bonding interactions connects the binuclear metal units into three-dimensional framework.