Synthesis, IR spectra, thermal analysis and crystal structure of a one-dimensional coordination polymer containing both three- and four-coordinate silver(I) centers bridged by both saccharinate and N-(2-hydroxyethyl)piperazine ligands

A novel [Ag2(m-sac)2(m-hep)2]n [sacZsaccharinate and hepZ{N-(2-hydroxyethyl)piperazine}] was synthesized and characterized. [Ag2(m-sac)2(m-hep)2]n consists of dimeric [Ag2(m-sac)2] units bridged by the hep ligands, resulting a one-dimensional coordination polymer. [Ag2(m-sac)2(m-hep)2]n contains two different silver(I) centers with a Ag–Ag separation of 3.492(2) A° . One of the silver(I) ion is trigonal planar to the imino N and carbonyl O atoms of two sac ligands and one of the N atom of hep, while the other silver(I) ion is tetrahedrally coordinated by the N and carbonyl O atoms of two sac ligands and the N and O chelating hep ligand. q 2004 Elsevier B.V. All rights reserved