Organotin(IV) derivatives of a triazoline thione ligand. Dimeric and self-assembled supramolecular helical structures

Abstract

Three new organotin(IV) complexes with 4-methyl-5-trifluoromethyl-4H-1,2,4-triazolin-3(2H)-thione {Me 3Sn[N(C 4H 4F 3N 2S)]} n ( 1), Ph 3Sn[S(C 4H 4F 3N 2)] ( 2), and { n-Bu 2Sn[N(C 4H 4F 3N 2S)](μ-OH)} 2 ( 3) have been synthesized and characterized by elemental, IR, 1H, 13C, and 119Sn NMR analyses and X-ray crystallography. The central tin atoms of complexes 1– 3 are all five-coordinated with distorted trigonal bipyramidal geometries. Interestingly, 1 shows an infinite helical polymeric chain structure via intermolecular Sn ← S interactions, however, 2 and 3 show dimeric and Sn 2O 2 unit structures, respectively.