Catena-Poly[[bis(N,N-dimethylformamide-κO)nickel(II)]-di-μ-1,5-dicyanamido-κN1:κN5

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 NiII 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 NiII 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 NiII atoms are connected through two asymmetric end-to-end dca bridges.