Acta Cryst. (2005). E61, m1937-m1939  [ doi:10.1107/S1600536805027674 ]

catena-Poly[[bis(N,N-dimethylformamide-O)nickel(II)]-di--1,5-dicyanamido-N¹:N⁵]

X.-P. Shen and A.-H. Yuan

Abstract: In the crystal structure of the title complex, [Ni(C₂N₃)₂(C₃H₇NO)₂]_n or [Ni(dca)₂(DMF)₂]_n, where dca is dicyanamide and DMF is N,N-dimethylformamide, each Ni^II atom is six-coordinated in a distorted octahedral coordination environment. Four N atoms from four dca ligands fill the equatorial positions, and two O atoms from two DMF ligands fill the axial positions. The structure is isostructural with [Co(dca)₂(DMF)₂]_n but is not isostructural with [Mn(dca)₂(DMF)₂]_n. The Ni^II atom and the dicyanamide bridging ligand occupy special positions of symmetry 2/m and m, respectively. The structure consists of uniform neutral chains where neighbouring Ni^II atoms are connected through two asymmetric end-to-end dca bridges.

Online 14 September 2005

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