Different coordination modes of the thiosaccharinate anion in dinuclear and one dimensional polymeric silver–azine complexes

Abstract

The effect of substituted pyridines bases upon the coordination of thiosaccharinate (tsac, C 7H 4NO 2S 2 − in ternary silver complexes is analyzed. Four crystalline silver-substituted pyridine complexes with tsac as a coordinating counter anion, [Ag(tsac)(3-methylpyridine) 2] n , [Ag 2(tsac) 2(4-methylpyridine)] n , [Ag 2(tsac) 2(quinoline) 2] and [Ag(tsac)(4-methyloxypyridine)] n were synthesized and characterized by means of spectroscopic (IR and Raman, UV–Vis, and 1H and 13C NMR) and X-ray diffraction techniques. The thiosaccharinate anion showed its versatility coordinating to the metal in each complex by a different way. In the 3-Mepy complex it was coordinated in a μ 2-S mode and in the 4-MeOpy complex it was bound in a μ 3-S form both resulting in polymeric chains. In the 4-Mepy complex the anion was bound in a μ 2-S,N head to head mode and in the quinoline complex in a μ 2-S,N head to tail mode, both showing dinuclear arrangements.