Assembly of silver alkynyl compounds with various nuclearities

Abstract

A convenient method for the synthesis of silver alkynyl compounds containing different nuclearities has been developed. The reaction of AgCCBu^t and AgX (X = CF₃CO₂⁻, C₂F₅CO₂⁻) in the presence of auxiliary ligands L (L = bipyridine, bipy; 1,10-phenanthroline, phen; 2-(diphenylphosphino)pyridine, dppy) under different conditions afforded a family of new silver alkynyl compounds, namely, [Ag₃(bipy)(CCBu^t)(CF₃CO₂)₂]_n (1), [Ag₄(bipy)₂(CCBu^t)(CF₃CO₂)₃]_n (2), [Ag₆(phen)₃(CCBu^t)₂(C₂F₅CO₂)₄(MeOH)(EtOH)] (3), [Ag₈L₄(CCBu^t)₂(C₂F₅CO₂)₆] (L = bipy, 4; L = phen, 5), [Ag₁₀(dppy)₂(CCBu^t)₆X₄] (X = CF₃CO₂⁻, 6; X = C₂F₅CO₂⁻, 7), [Ag₁₂(bipy)₂(CCBu^t)₈(C₂F₅CO₂)₄] (8) and [Ag₁₂(phen)₄(CCBu^t)₆(CF₃CO₂)₆]·2EtOH (9). Single-crystal X-ray analysis revealed that compounds 1 and 2 display infinite-chain structures, while the other seven compounds are discrete molecules containing silver nuclearities varying from 6 to 12. The formation of various structural motifs depends on the reactant ratios and the ligands/anions with different nature.