(2-Methylthio-3-Pyridinecarboxylato)-diethyltin and -di-n-butyltin compounds: synthesis, spectroscopic characterization and in vitro antitumour activity. X-ray crystal structure of bis[diethyl(2-methylthio-3-Pyridinecarboxylato)tin] oxide and of diethyltin bis(2-methylthio-3-pyridinecarboxylate)

The X-ray crystal structures of [diethyl(2-methylthio-3-pyridinecarboxylato)tin] oxide (1a) and diethyltin bis(2-methylthio-3-pyridinecarboxylate) (1b) were determined. Compound 1a is a centrosymmetric dimer with two distinct types of carboxylate moieties and tin atoms with trigonal bipyramidal geometries. Compound 1b is monomeric with a six-coordinate tin atom and two equivalent carboxylate groups chelating the tin atom. Compounds 2a and 2b,...