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Acta Cryst. (2008). E64, m489 [ doi:10.1107/S160053680800442X ]

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

X.-M. Song, X.-Q. Huang, J.-M. Dou and D.-C. Li

Abstract: The title complex, bis( [mu] -benzene-18-crown-6)-3 [kappa] ⁶O:4 [kappa] O;4 [kappa] ⁶O:3 [kappa] O-bis(benzene-18-crown-6)-1 [kappa] ⁶O,6 [kappa] ⁶O-tetra- [mu] -thiocyanato-1:2 [kappa] ²S:N;2:3 [kappa] ²N:S;4:5 [kappa] ²S:N;5:6 [kappa] ²N:S-dithiocyanato-2 [kappa] N,5 [kappa] N-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 Cu^I 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.

Online 20 February 2008