Synthesis and structural characterization of new dinuclear silver(I) complexes: Different coordination modes of substituted 1,2,4-triazine ligands

Two new binuclear silver(I) complexes of 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine (PDT) and 3,5,6-tris(2-pyridyl)-1,2,4-triazine(TPT)ligands, [Ag-2(PDT)(2)(NO3)(2)], 1, and [Ag-2(TPT)(2)(NO3)(2)], 2, have been synthesized and characterized by elemental analysis, IR and H-1 NMR spectroscopy, and also studied by thermal and electrochemical analysis as well as by X-ray crystallography. The individual dinuclear complexes in 1 are extended into a one-dimensional layered structure by weak Ag center dot center dot center dot C-PDT (eta(3)) interactions. The interesting features of the Ag(I) complexes are the different coordination modes of the ligands. The supramolecular features in these complexes are controlled by weak directional intra and intermolecular interactions. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.