Assembly of Organosilver(Ⅰ) Frameworks with Trifluoroacetate and Ethynylphenyl Ligands Bearing Isocyano Substitutents

摘要

A series of seven silver(Ⅰ) trifluoroacetate complexes containing ethynylphenyl ligands bearing ethynyl and isocyano substituents at variable positions has been synthesized and characterized by single-crystal X-ray analysis. It is established that the isocyano carbon atom, which bears a formal negative charge, only functions in the monodentate coordination mode in a silver-rich environment, in contrast to the terminal, negatively-charged ethynide carbon atom, which is capable of binding several silver(Ⅰ) centers in directing the construction of two- or three-dimensional organosilver(Ⅰ) networks, which are consolidated by argentophilic and weak intermolecular interactions in supramolecular assembly. The equivalence of isocyano and cyano groups in their coordination capacity is demonstrated by establishment of isomorphism in two pairs of their respective crystalline complexes.