Crystal structure of poly[(μ(3)-thio­cyanato-κ(3) N:S:S)(tri­methyl­phosphine sulfide-κS)copper(I)]

In the title compound, [Cu(NCS)(C(3)H(9)PS)](n), the thio­cyanate ions bind the Cu(I) atoms covalently, forming infinite –Cu—SCN—Cu– chains parallel to the a axis. Each Cu(I) atom is also coordinated to a tri­methyl­phosphine sulfide group via a Cu—S bond. Two crystallographically independent chains propagate in opposite directions, and are held together in a ribbon arrangement by long bonds between Cu(I) atoms in the first chain and thio­cyanate S atoms in the second, with Cu—S = 2.621 (1) Å. The geometry around the Cu(I) atoms in the first chain is distorted tetra­hedral, with angles involving the long Cu—S bond much less than ideal, and the S—Cu—N angle between the phosphine sulfide S atom and the thio­cyanate N atom opening out to 133.19 (9)°. Each Cu(I) atom in the second chain appears to be disordered between two positions 0.524 (4) Å apart, with occupancy factors of 0.647 (6) and 0.353 (6). The Cu(I) atom in the major site is in a distorted trigonal–planar configuration, with the S—Cu—N angle between the phosphine sulfide and the thio­cyanate N atom again opened out, to 137.01 (15)°. The Cu(I) atom in the minor site, however, forms in addition a long bond [Cu—S = 2.702 (5) Å] to the phosphine sulfide of the first chain, not the thio­cyanate S atom, to provide a further link between the chains.