Assembly of organosilver coordination frameworks with aromatic ligands bearing a terminal enediyne group

Abstract

In a series of five silver(I) complexes synthesized with (2-ethynylbut-1-en-3-yne-1,1-diyl)dibenzene (H2L1) and 9-(penta-1,4-diyn-3-ylidene)-9H-fluorene (H2L2), each resulting ethynide ligand is invariably inserted into a Agn (n=3–4) basket, leading to the generation of coordination chains or multinuclear metallocycles, but the well shielded ethenyl group does not take part in silver–olefin binding. In (Ag2L1)·9AgCF3CO2·3H2O·3CH3CN and (Ag2L1)2·9AgCF3CO2·11H2O, which can be crystallized in different polar protic solvent media, an infinite chain composed of metallocycles is favorably generated with the assistance of silver–aromatic interaction; such chains are further interconnected to form a two- or three-dimensional organosilver network. In (Ag2L2)·5AgCF3CO2·5DMSO, the fluorenyl group does not participate in silver–aromatic interaction; however, its planar skeleton directs the construction of a more closely packed metal–organic coordination chain.