Supramolecular organization in catena-poly{diethyl[3-(2-pyridyl)-2-sulfanylpropenoato]tin(IV)} and related diorganotin(IV) sulfanylcarboxylato compounds

Abstract

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