CRYSTAL-STRUCTURE OF THE SUPRAMOLECULAR S ILVER(I)THIOCYANATE CYCLAM COMPLEX [AG(SCN)CENTER-DOT(C10H24N4)(1 2)]/

Colourless crystals of the 1,4,8,11-tetraazacyclotetradecane (cyclam) silver(I) thiocyanate complex [Ag(SCN).(C10H24N4)(1/2)] were obtained by diffusion of a solution of cyclam in ethanol into an aqueous soluti on of K[Ag(SCN)(2)]. The crystals are tetragonal, space group P4(2)/n, Z = 8, a = b = 1256.0(4), c = 1185.5(9) pm. The SCN groups act as mu( 3) ligands, the S atoms of two SCN groups bridge two neighbouring Ag i ons, which are only 297.5 pm apart, forming butterfly-like Ag2S2 moiet ies, the N atoms of the SCN groups form bonds to Ag atoms of adjacent Ag2S2 moieties. Two Ag2S2 units are again connected by cyclam molecule s which act as two-dentate bridging ligands. Thus a complicated three- dimensional ''supramolecular'' structure results.