Argentophilic infinite chain, column, and layer structures assembled with the multinuclear silver(I)-phenylethynide supramolecular synthon

摘要

Nine silver(I) complexes bearing the phenylethynide ligand and different ancillary anions, namely, double salts AgC≡CPh?AgNO _3 (1), 2AgC≡CPh?AgNO _3 (2), [Ag _5(C≡CPh) _4(DMSO) _2]X [X = BF _4 (3A), ClO _4 (3B), PF _6 (3C), AsF _6 (3D), SbF _6 (3E)], 2AgC≡CPh?5AgO _2CCF _3?4DMSO (4), and a triple salt 10AgC≡CPh?2AgOTf?AgNO _3?3DMSO (5), have been synthesized and shown to possess coordination frameworks that are assembled with the supramolecular synthon Ph-C≡C?Ag _n (n = 3, 4, 5). Different argentophilic layers are found in nitrate complexes 1 and 2, which are crystallized from water and mixed water/DMSO, respectively. Difficulty was encountered in growing quality crystals of complexes 3A-3E, 4, and 5 bearing weakly coordinating anions, but DMSO proved to be a good solvent for crystallization by functioning as a coligand. The isostructural compounds 3A-3E exhibit the same type of pseudohexagonal packing of infinite silver columns, with the ancillary anionic component filling the intervening space and linking adjacent columns via weak hydrogen bonds. Three-dimensional supramolecular frameworks based on similar packing of silver chains and columns, respectively, are found in double salt 4 and triple salt 5.