Abstract
The title complex, bis(μ-benzene-18-crown-6)-3κ6 O:4κO;4κ6 O:3κO-bis(benzene-18-crown-6)-1κ6 O,6κ6 O-tetra-μ-thiocyanato-1:2κ2 S:N;2:3κ2 N:S;4:5κ2 S:N;5:6κ2 N: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 . 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.
Highlights
In each [Cu(NCS)3]2À anion, the CuI atom is coordinated by three N atoms of thiocyanate ligands in a trigonal–planar coordination geometry
Each [Cu(NCS)3]2À anion bridges two [K(benzene-18-crown-6)]+ cations, with K— S distances of 3.317 (3) and 3.198 (3) A, and two [K(benzene18-crown-6)]+ cations are linked across a crystallographic centre of inversion, with K—O distances of 2.903 (5) A
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BI2279)
Summary
Key indicators: single-crystal X-ray study; T = 273 K; mean (C–C) = 0.013 A; R factor = 0.063; wR factor = 0.161; data-to-parameter ratio = 15.1. The title complex, bis(-benzene-18-crown-6)-36O:4O;46O:3O-bis(benzene-18-crown-6)-16O,66O-tetra--thiocyanato-1:22S:N;2:32N:S;4:52S:N;5:62N:S-dithiocyanato2N,5N-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]2À anions, forming a dimeric structure with site symmetry 1. In each [Cu(NCS)3]2À anion, the CuI atom is coordinated by three N atoms of thiocyanate ligands in a trigonal–planar coordination geometry. Each [Cu(NCS)3]2À anion bridges two [K(benzene-18-crown-6)]+ cations, with K— S distances of 3.317 (3) and 3.198 (3) A , and two [K(benzene18-crown-6)]+ cations are linked across a crystallographic centre of inversion, with K—O distances of 2.903 (5) A. Related literature For structures incorporating [Cu(NCS)3]2À anions, see: Rusanova et al (2000); Wang et al (1987). For polymeric structures incorporating crown ethers, see: Desai et al (2001); Bastos et al (2000).
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