Halogen Bonding in the Assembly of Silver(I)-ethynide Complexes with 1-Iodo-3,5-bis(prop-2-ynyloxy)benzene

Abstract

The reactions of ethynide dianionic ligand, 1-iodo-3,5-bis(prop-2-ynyloxy)benzene (H 2 L), and silver(I) trifluorocarboxylate under solvent evaporation conditions yielded two silver(I)-ethynide complexes, namely, [(Ag 2 L) 2 (AgCF 3-CO 2 ) 4 (H 2 O) 2 ] n (1) and [(Ag 2 L) 4 (AgCF 3 CO 2 ) 3 ] n (2). In 1, two types of Ag 12 aggregates are fused into silver(I) columns through vertex-sharing and edge-sharing, which are further linked through interchain weak AgÁÁÁI and FÁÁÁI halogen bonding into a 3D supramolecular network. In 2, Ag 22 aggregates are bridged by two L ligands to form an infinite chain, and then such chains are interconnected by relatively weak C-HÁÁÁF hydrogen bond to generate a two-dimensional network.