Synthesis and characterization of diorganolead(IV) bis-thiocarboxylate and its application as a molecular precursor of lead sulfide

Diphenyllead(IV) bis-thiobenzoate was synthesized by a reaction of diphenyllead dichloride in THF medium. The molecule has been characterized by spectral and single crystal X-ray diffraction analysis. Bonding of the thiocarboxylate ligand is primarily through S atom, however, Pb–O distance indicated the existence of significant Pb⋯O interaction. Bonding features have been explained on the basis of DFT calculations. NBO analysis revealed significant second order perturbation. Electronic transitions have been calculated by TD DFT method and the results are consistent with the experimental spectrum. DSC study has been carried out to measure the heat of fusion of the compound. Room temperature hydrolysis and thermal decomposition reactions have been carried out on the compound under different conditions. The thermally decomposed product was characterized as lead sulfide by powder X-ray diffraction and transmission electron microscopic studies.