Acta Cryst. (2013). E69, m90
[ doi:10.1107/S1600536812051252 ]

catena-Poly[[bis(4-methylpyridine-N)cobalt(II)]-di--dicyanamido-²N¹:N⁵]

W. Huang, J. Zhang and C. Zhang

Abstract: Cobalt(II) nitrate hexahydrate and sodium dicyanamide self-assembled in dimethylformamide (DMF) and 4-methylpyridine solutions to form the title compound, [Co(C₂N₃)₂(C₆H₇N)₂]_n. The Co²⁺ ion lies on an inversion center and adopts an octahedral coordination geometry in which four N atoms from four different dicyanamide ligands lie in the equatorial plane and two 4-methylpyridine N atoms occupy the axial positions. The Co^II atoms are connected by two bridging dicyanamide ligands, resulting in a chain parallel to the c axis. The chains are connected into a three-dimensional network by C-HN hydrogen bonds.

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