摘要:
Three ligands bearing terminal ethynide moiety attached via pendent arm to a phenyl skeleton have been used in synthesis of three silver (I) complexes, namely, [(AgL1)(AgCF3CO2)(3)](n) (1), {[(AgL2)(AgCF3-CO2) (6)(H2O)(2)]center dot(H2O)(6)}(n) (2) and [(AgL3)center dot(AgCF3CO2)(5)(H2O)](n) (3), in which several unconventional intermolecular interactions (silver-ethynyl, silverearomatic, argentophilicity and C-H center dot center dot center dot pi) have been shown to play vital role in the formation and stabilization of supramolecular structures. In 1, butterfly-shaped Ag-4 baskets are interconnected together by trifluoroacetate groups to lead to a layer structure, which is also consolidated by silverearomatic interactions, adjacent layers are then linked into a three-dimensional supramolecular architecture through weak C-H center dot center dot center dot F hydrogen bonding. In 2, ladder type chains are associated into three-dimensional supramolecular architecture through a rich hydrogen-bonding system. In 3, square-pyramidal Ag-5 baskets are also fused together by the trifluoroacetate groups with the assistance of argentophilic interactions and silverearomatic interaction give rise to a 2D coordination network, which are further united by C-H center dot center dot center dot pi interaction to produce a three-dimensional supramolecular framework. (C) 2012 Elsevier B.V. All rights reserved.