Catena-Poly[[bis(4-methylpyridine-κN)cobalt(II)]-di-μ-dicyanamido-κ2N1:N5

Wenjiang Huang,Chi Zhang,Jinfang Zhang

doi:10.1107/s1600536812051252

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 CoII 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—H⋯N hydrogen bonds.

Highlights

Cobalt(II) nitrate hexahydrate and sodium dicyanamide selfassembled 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 CoII atoms are connected by two bridging dicyanamide ligands, resulting in a chain parallel to the c axis

Summary

Structure Reports Online

Key indicators: single-crystal X-ray study; T = 150 K; mean (C–C) = 0.003 A; R factor = 0.031; wR factor = 0.085; data-to-parameter ratio = 13.5. Cobalt(II) nitrate hexahydrate and sodium dicyanamide selfassembled 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 CoII 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—HÁ Á ÁN hydrogen bonds. Crystal data [Co(C2N3)2(C6H7N)2] Mr = 377.28 Monoclinic, P21=c a = 9.3686 (19) Ab = 13.080 (3) Ac = 7.3048 (15) A = 106.86 (3)

Data collection

HÁ Á ÁA

Special details