Crystal structure of poly[(2,2′-bi­pyridine-κ2N,N′)tetra­kis­(μ-cyanido-κ2N:C)dinickel(II)]

Acta Crystallographica Section E: Crystallographic Communications

Zuo, M.¹  Cui, S.¹  Zhu, L.¹  Wang, H.¹  Xu, J.¹ 

[1] College of Chemistry and Chemical Engineering, Mu Danjiang Normal University, Mu Danjiang 157012, People's Republic of China

关键词: CRYSTAL STRUCTURE;    CYANIDE LIGANDS;    NICKEL;    2,2'-BIPYRIDINE;    COORDINATION POLYMER;   

DOI  :  10.1107/S2056989015009706

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The polymeric title complex, [Ni2(CN)4(C10H8N2)]n, was obtained serendipitously under hydro­thermal conditions. The asymmetric unit consists of one half of an [Ni(CN)4]2− anion with the Ni2+ cation situated on an inversion centre, and one half of an [Ni(2,2′-bpy)]2+ cation (2,2′-bpy is 2,2′-bi­pyridine), with the second Ni2+ cation situated on a twofold rotation axis. The two Ni2+ cations exhibit different coordination spheres. Whereas the coordination of the metal in the anion is that of a slightly distorted square defined by four C-bound cyanide ligands, the coordination in the cation is that of a distorted octa­hedron defined by four N-bound cyanide ligands and two N atoms from the chelating 2,2′-bpy ligand. The two different Ni2+ cations are alternately bridged by the cyanide ligands, resulting in a two-dimensional structure extending parallel to (010). Within the sheets, π–π inter­actions between pyridine rings of neighbouring 2,2′-bpy ligands, with a centroid-to-centroid distance of 3.687 (3) Å, are present. The crystal packing is dominated by van der Waals forces. A weak C—H⋯N inter­action between adjacent sheets is also observed.

【 授权许可】

CC BY