Tetrakis[(benzene-18-crown-6)potassium]bis[tris(thiocyanato)copper(I)]

Abstract

The title complex, bis(μ-benzene-18-crown-6)-3κ6O:4κO;4κ6O:3κO-bis(benzene-18-crown-6)-1κ6O,6κ6O-tetra-μ-thiocyanato-1:2κ2S:N;2:3κ2N:S;4:5κ2S:N;5:6κ2N:S-dithiocyanato-2κN,5κN-2,5-dicopper(I)-1,3,4,6-tetrapotassium(I), [K4Cu2(NCS)6(C16H24O6)4] or {[K(C16H24O6)]4[Cu(NCS)3]2}, consists of four [K(benzene-18-crown-6)]+ cations and two [Cu(NCS)3]2− anions, forming a dimeric structure with site symmetry overline{1}. In each [Cu(NCS)3]2− anion, the CuI atom is coordinated by three N atoms of thiocyanate ligands in a trigonal–planar coordination geometry. Each [Cu(NCS)3]2− anion bridges two [K(benzene-18-crown-6)]+ cations, with K—S distances of 3.317 (3) and 3.198 (3) Å, and two [K(benzene-18-crown-6)]+ cations are linked across a crystallographic centre of inversion, with K—O distances of 2.903 (5) Å.