Redetermination of catena-poly[[chlorido­(thio­urea-κS)copper(I)]-μ-thio­urea-κ(2) S:S] at 100 K

The structure of the polymeric title compound, [CuCl(CH(4)N(2)S)(2)](n), has been redetermined to modern standards of precision with anisotropic refinement and location of the H atoms. The previous structure report [Spofford & Amma (1970 ▶). Acta Cryst. B26, 1474–1483] is generally confirmed to higher precision [typical Cu—S bond length s.u. values = 0.005 (old) and 0.001 Å (new)]. The asymmetric unit contains two formula units, with both Cu(I) atoms coordinated by one terminal S atom and two bridging S atoms of thio­urea ligands. This connectivity leads to polymeric [100] chains in the crystal. If very long contacts to nearby chloride ions [2.8687 (9) and 3.1394 (12) Å] are considered to be bonding, then very distorted CuS(3)Cl tetra­hedral coordination polyhedra arise. The crystal structure is consolidated by weak intra- and inter-chain N—H⋯S and N—H⋯Cl hydrogen bonds.