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

摘要

In a series of five silver(I) complexes synthesized with (2-ethynylbut-1-en-3-yne-1,1-diyl)dibenzene (H_2L1) and 9-(penta-1,4-diyn-3-ylidene)-9H-fluorene (H_2L2), each resulting ethynide ligand is invariably inserted into a Ag_n (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 (Ag_2L1)·9AgCF_3CO_2·3H _2O·3CH_3CN and (Ag_2L1) _2·9AgCF_3CO_2·11H_2O, 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 (Ag_2L2) ·5AgCF_3CO_2·5DMSO, 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.