title: Tetrakis[(benzene-18-crown-6)potassium]bis[tris(thiocyanato)copper(I)].
abstract: The title complex, bis-(μ-benzene-18-crown-6)-3κ(6)O:4κO;4κ(6)O:3κO-bis-(benzene-18-crown-6)-1κ(6)O,6κ(6)O-tetra-μ-thiocyanato-1:2κ(2)S:N;2:3κ(2)N:S;4:5κ(2)S:N;5:6κ(2)N:S-dithio-cyanato-2κN,5κN-2,5-dicopper(I)-1,3,4,6-tetra-potassium(I), [K(4)Cu(2)(NCS)(6)(C(16)H(24)O(6))(4)] or {[K(C(16)H(24)O(6))](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 Cu(I) atom is coordinated by three N atoms of thio-cyanate 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.
authors.affiliation: College of Chemistry and Chemical Engineering, Liaocheng University, Shandong 252059, People's Republic of China.
authors.forename: Xing-Min
authors.initials: XM
authors.lastname: Song
authors.forename: Xian-Qiang
authors.initials: XQ
authors.lastname: Huang
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Dou
authors.forename: Da-Cheng
authors.initials: DC
authors.lastname: Li