Synthesis and Crystal Structure of a Dinuclear Cobalt(II) Complex Co2(1H-benzimidazole)4(1,4-bdoa)2

摘要

A novel dinuclear complex with an empirical formula [Co2(1H-benzimidazole)4(1, 4-bdoa)2] (1,4-bdoa2- = benzene-1,4-dioxyacetate dianion) has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. It crystallizes in monoclinic system, space group P21/c with a = 11.000(2), b = 19.385(4), c = 11.417(2)(A), β = 95.49(3)°, V = 2423.3(8) (A)3, Z = 2, Mr = 1074.77, Dc = 1.473 g/cm3, μ = 0.760 mm-1, F(000) = 1108, the final R = 0.0645 and wR = 0.0714 for 3273 observed reflections (I > 2σ(I)). Two octahedrally coordinated Co(II) atoms are bridged by two 1,4-bdoa2- groups, generating a macrocyclic ring complex. The Co…Co separa- tion is 7.677(3) (A). An extended 3-D supramolecular network is formed through hydrogen bonds and weak π-π stacking interactions.