Synthesis and Structures of Silver(I) Adducts with 4-Amino-3,5-diisobutyl-4H-1,2,4-triazole: The Identification of a New Type of Ag3tz6 Cluster

Abstract

Reactions of silver(I) salts with 4-amino-3,5-diisobutyl-4H-1,2,4-triazole (4-NH2-3,5- i Bu2-tz) or 4-amino-3,5-dibutyl-4H-1,2,4-triazole (4-NH2-3,5-Bu2-tz) yielded five new adducts, namely, [Ag2(4-NH2-3,5- i Bu2-tz)2(NO3)2] (1), [Ag3(4-NH2-3,5- i Bu2-tz)6](SO3CF3)3 (2), [Ag3(4-NH2-3,5- i Bu2-tz)6](ClO4)3 (3), [Ag4(4-NH2-3,5-Bu2-tz)6](ClO4)4 (4) and [Ag4(4-NH2-3,5-Bu2-tz)6](CF3SO3)4 (5). X-ray analyses have been done on the first four adducts, showing that 1 and 4 adopt previously observed Ag2tz2 and Ag4tz6-a cluster structures, respectively; 2 and 3, on the other hand, contain an unprecedented Ag3tz6 cluster, which is closely related to Ag4tz6–a cluster by removal of one Ag atom from the latter. The formation of Ag3tz6 cluster other than the expected Ag4tz6 cluster in 2 and 3 has been tentatively attributed to the steric effect of isobutyl groups.