LAUSR

A series of axially chiral bis-1,2,3-triazol-5-ylidene Au(I) complexes (R)-8a–g and one mono-1,2,3-triazol-5-ylidene Au(I) complex (R)-9a were prepared from commercially available (R)-binaphthyl-2,2-diamine (BINAM) compound, in which, transmetalation of bis(MIC)-bis[Ag(I)] intermediates to the corresponding Au(I) complexes were employed as the key synthetic step. The structures of these MIC–Au(I) complexes were diversified by using different alkyne reagents in copper catalyzed azide–alkyne cycloaddition (CAAC) step. Three chiral bis-1,2,3-triazol-5-ylidene Ag(I) complexes, (R)-7a, (R)-7c, and (R)-7d, were prepared and fully characterized. On the basis of (R)-7a’s crystal structure, a chiral tetra(MIC)-bis(Ag) structure was exhibited, with two chiral bis-1,2,3-triazol-5-ylidene ligands interconnected by two nearly linear silver atom bridges, of which, significant Ag(I)–Ag(I) bonding existed. The crystal structures of (R)-8a, (R)-8f, and (R)-8g were also obtained, which exhibit an axially chiral bis(MIC)-bi...