Complexes of organometallic compounds—XXIX: Anion exchange studies of acid effect and complex formation on methylmercury(II)-, diethyllead(IV)- and triethyllead(IV)-chloride systems

Abstract

The dependence on the acidity of the aqueous phase of anion exchange distribution coefficients of CH 3HgCl, (C 2H 5) 2PbCl 2 and (C 2H 5) 3PbCl, has been measured at constant ionic strength in 8·0 M LiCl + HCl. The distributions of CH 3HgCl between resin and aqueous HCl and LiCl solutions have been determined. The acid effect suggested the retention in the resin phase of the species CH 3HgCl 3 2−, (C 2H 5) 2-PbCl 4 2− and (C 2H 5) 3PbCl 3 2−, from which the nature of the complex species present in the solution phase at varying ligand concentrations was deduced. The stability constants of the chloride complexes formed in aqueous LiCl have been evaluated.