Assembly of silver alkynyl compounds with various nuclearities†
A convenient method for the synthesis of silver alkynyl compounds containing different nuclearities has been developed. The reaction of AgCCBut 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)(CCBut)(CF3CO2)2]n (1), [Ag4(bipy)2(CCBut)(CF3CO2)3]n (2), [Ag6(phen)3(CCBut)2(C2F5CO2)4(MeOH)(EtOH)] (3), [Ag8L4(CCBut)2(C2F5CO2)6] (L = bipy, 4; L = phen, 5), [Ag10(dppy)2(CCBut)6X4] (X = CF3CO2−, 6; X = C2F5CO2−, 7), [Ag12(bipy)2(CCBut)8(C2F5CO2)4] (8) and [Ag12(phen)4(CCBut)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.