SUPRAMOLECULAR ORGANIZATION IN IETHYL[3-(2-PYRIDYL)-2-SULFANYLPROPENOATO]TIN(IV)) AND RELATED DIORGANOTIN(IV) SULFANYLCARBOXYLATO COMPOUNDS

Reaction of 3-(2-aryl)-2-sulfanylpropenoic acids with diorganotin(IV) oxides afforded compounds of the type [SnR2L] [R = Me, Et, Bu-n or Ph; H2L = 3-(2-thienyl)-, -(phenyl)- or -(2-pyridyl)-2-sulfanylpropenoic acid]. The structure of [SnEt2(pyspa)] was determined by single-crysta l X-ray diffraction and shown to be polymeric, with the tin atom in a distorted trigonal-bipyramidal environment created by intramolecular b onds to a C atom of each of two ethyl groups and to a sulfur and a car boxylic oxygen of the pyspa ligand together with an additional intermo lecular Sn-O bond. Mass, Mossbauer, IR, Raman and NMR spectroscopy of the other eleven compounds prepared suggests similar polymeric structu res for all.