Acta Crystallographica Section E: Crystallographic Communications
The title compound, [CuCl2(C12H12N2)]n, was obtained via a DMSO-mediated dehydration of Cu(4,4'-dimethyl-2,2'-bipyridine)copper(II)·0.25H2O. The central CuII atom is coordinated in a distorted trigonal-bipyramidal geometry by two N atoms of a chelating 4,4'-dimethyl-2,2'-bipyridine ligand [average Cu-N = 2.03 (3) Å] and three Cl atoms, one terminal with a short Cu-Cl bond of 2.2506 (10) Å, and two symmetry-equivalent and bridging bonds. The bridging Cl atom links the CuII ions into chains parallel to  via one medium and one long Cu-Cl bond [2.3320 (10) and 2.5623 (9) Å]. The structure displays both inter- and intramolecular C-H⋯Cl hydrogen bonding.
Nita, R., Deschamps, J.R., Trammell, S.A., Knight, D.A. Crystal structure of catena-poly[[chlorido(4,4'-dimethyl-2,2'-bipyridine-κ2N,N')copper(II)]-μ-chlorido] (2015) Acta Crystallographica Section E: Crystallographic Communications, 71, pp. 624-627.