title: Synthesis and characterization of novel S,N and Se,N homodimetallic Ag(I)-complexes.
abstract: Novel C2-symmetric doubly bidentate Se,N and S,N-ligands based on a readily available Tröger's base backbone were synthesized and fully characterized. Their coordination properties were studied in dinuclear Ag(I)-complexes employing (1)H, (77)Se and (1)H-(15)N HETCOR NMR spectroscopy as well as X-ray diffraction crystallography. In solution, a single ligand can accommodate two silver atoms by coordination to nitrogen and sulfur or selenium. The investigations in the solid state revealed the presence of a pentacoordinated silver atom (NSO(3) and N(3)Se(2) donor sets are influenced by the solvent employed during the crystallization). In the solid state, the Ag(I)-complex with the S,N-ligand 2b forms dimeric structures bridged by the two perchlorate counterions. The analogous Se,N-ligand 2c coordinates to Ag(I) and forms polymeric enantiomerically pure helices, although the crystal is racemic.
authors.affiliation: Department of Chemistry and Applied Biosciences, HCI H230 Swiss Federal Institute of Technology, ETH Zürich, CH-8093 Zürich, Switzerland. cvengros@inorg.chem.ethz.ch
authors.forename: Ján
authors.initials: J
authors.lastname: Cvengroš
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Maennel
authors.forename: Nico
authors.initials: N
authors.lastname: Santschi