Crystal structure of a new mixed-metal coordination polymer consisting of NiII piperidine-dithiocarbamate and pentanuclear CuI—I cluster units

A new heterometallic Cu I –Ni II coordination polymer, poly[[tetra-μ 3 -iodido-μ 2 -iodido-bis(μ 3 -piperidine-1-dithiocarbamato)propionitrilepentacopper(I)nickel(II)] chloroform monosolvate], {[Cu I 5 Ni II I 5 (C 6 H 10 NS 2 ) 2 (C 3 H 5 N)]·CHCl 3 } n , has been synthesized and structurally characterized. This coordination polymer consists of an Ni II mononuclear unit of Ni II (Pip-dtc) 2 (Pip-dtc − is piperidine-1-dithiocarbamate) and a pentanuclear copper(I) cluster unit of Cu 5 I 5 (CH 3 CH 2 CN). The Ni II ion, which lies on an inversion centre, is surrounded by four S atoms in a square-planar coordination geometry while all Cu I ions have distorted tetrahedral coordination geometries. In the pentanuclear copper(I) cluster unit, a mirror plane passes through one Cu I ion and three I ions. All the S atoms in Ni II (Pip-dtc) are also coordinated by the Cu I ions, forming an infinite zigzag chain structure along the b- axis direction. The chains are weakly connected by solvent CHCl 3 molecules via Cl...I [3.653 (1) Å] and Cl...S [3.4370 (1) Å] short-contact interactions.