Relaying Isomerism from Ligands to Metal Complexes: Synthesis and Structures of Four Isomeric Binary Silver(I) 3,5-Dibutyl-1,2,4-triazolates

Abstract

Four isomers of 3,5-dibutyl-1H-1,2,4-triazole (3,5-R2tzH, R = butyl (nBu), isobutyl (iBu), secondary butyl (sBu), and tertiary butyl (tBu)) have been synthesized by condensation of the corresponding organic acids and hydrazine, followed by a deamination reaction. Their binary silver complexes have been prepared and structurally characterized by X-ray diffraction. [Ag(3,5-nBu2tz)]n and [Ag(3,5-iBu2tz)]n exhibit 3D structures of cds and dia topologies, respectively, while [Ag(3,5-sBu2tz)]n displays a 2D sql net and [Ag(3,5-tBu2tz)]4 is a 0D tetranuclear complex. Having the same empirical formula, these four binary silver triazolates are true isomers, differing in their linkage and triazole coordination modes. This work represents an interesting case in which ligand isomerism is manifested in the structures of the corresponding metal complexes.