Syntheses and crystal structures of five two-dimensional networks constructed from staircase-like silver(I) thiocyanate chains and bridging polyamines

摘要

Five co-ordination polymers ~[(AgSCNhL]{L = 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane or 1,5-diaminopentane) and ~[(AgSCN)3L] (L =N,N'.-bis(3-aminopropyl)ethylenediamine) have been synthesized and structurally characterised by single-crystaiX-raydiffraction. Each complex contains one-dimensional staircase-Iike ~(AgSCN)J chains in which each thiocyanate ligand acts in the !!-N,S,S-bridging mode. Every silver(I) atom in the staircase-like chain is further co-ordinated by a terminal nitrogen atom of the amine ligand to furnish a highly distorted AgN2S2 tetrahedral geometry. Both ends of the amine ligandsparticipate in co-ordination, extending the one-dimensional staircase-Iike ~[(AgSCN)J chains to two-dimensional staircase-Iike or square-wave like ~[(AgSCN)_2L] networks in 1-4, whereas adjacent chelating ethylenediamine entities of the amine ligands in 5 are further interlocked with the Ag2(!!-S-SCN)2dinuclear cores, resulting in a different formula ~[(AgSCN)3L].