Organobleiverbindungen von Mercaptocarbonsäuren / Organolead Compounds of Mercaptocarboxylic Acids

Abstract

Abstract Phenyllead Compounds, Methyllead Compounds, Organolead-S-mercaptocarboxylic Acids Triphenyl-and diphenyllead derivatives of mercaptocarboxylic acids (H2Mc) with general formulas Ph3Pb(HMc), (Ph3Pb)2Mc, Ph2Pb(HMc)2 and R2Pb(Mc) (R = Ph, Me) have been prepared by gentle reaction of H2Mc with Ph3PbOH, (Ph2PbO)n or Me2Pb(OH)2 in CHC13. According to spectroscopic data the ligand in all compounds is bound to Pb through S. Ph3Pb(HMc) (HMc = SCH2COOH, SCH2CH2COOH, SCH(CH3)COOH, SCH(COOH)CH2COOH forms dimers in the solid state and in CC14, Ph2Pb(CH2CH2COOH)2 forms polymers via H-bonded COOH groups. Ph3Pb(o-SC6H4COOH) is monomeric. For R2Pb(Mc) polymeric structures are proposed. Me3PbOH and H2Mc react to give an inter-mediate, which disproportionates to give Me2Pb(Mc) (Mc = SCH2COO, SCH2CH2COO) and Me4Pb.