A dinuclear complex of cobalt(II) with 2,2′‐(1,4‐butanediyl)dibenzimidazole |
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Authors: | Jin Yang Jian‐Fang Ma Ying‐Ying Liu |
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Abstract: | The title complex, [μ‐2,2′‐(1,4‐butanediyl)di‐1H‐benzimidazole‐κ2N3:N3′]bis{[2,2′‐(1,4‐butanediyl)di‐1H‐benzimidazole‐κ2N3,N3′](nitrato‐κO)cobalt(II)} dinitrate ethanol disolvate, [Co2(NO3)2(C18H18N4)3](NO3)2·2C2H6O, was obtained from self‐assembly of cobalt(II) nitrate with 2,2′‐(1,4‐butanediyl)dibenzimidazole (L). The complex molecule lies about an inversion centre and the flexible L ligands act in both bridging and chelating modes to form a dinuclear complex with unanticipated nine‐membered chelate rings. The unique uncoordinated nitrate anion is linked to the cation by pairs of N—H⋯O hydrogen bonds, which determine the overall cation conformation. Cation–anion sets are then linked by a further N—H⋯O hydrogen bond to generate a chain along [010]. Chains are linked by C—H⋯O hydrogen bonds to form sheets in the (100) plane. |
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