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

MARIANA DENNEHY; OSCAR VALENTÍN QUINZANI; ALEJANDRO GRANADOS; ROBERT ALAN BURROW

POLYHEDRON

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2010 vol. 29 p. 1344 - 1352

0277-5387

The effect of substituted pyridines bases upon the coordination of thiosaccharinate (tsac, C7H4NO2S2 internary silver complexes is analyzed. Four crystalline silver-substituted pyridine complexes with tsac as acoordinating counter anion, [Ag(tsac)(3-methylpyridine)2]n, [Ag2(tsac)2(4-methylpyridine)]n, [Ag2(tsac)2(quinoline)2] and [Ag(tsac)(4-methyloxypyridine)]n were synthesized and characterized by means ofspectroscopic (IR and Raman, UV–Vis, and 1H and 13C NMR) and X-ray diffraction techniques. The thiosaccharinateanion showed its versatility coordinating to the metal in each complex by a differentway. In the 3-Mepy complex it was coordinated in a l2-S mode and in the 4-MeOpy complex it wasbound in a l3-S form both resulting in polymeric chains. In the 4-Mepy complex the anion was boundin a l2-S,N head to head mode and in the quinoline complex in a l2-S,N head to tail mode, both showingdinuclear arrangements.