PHENYLLEAD(IV) DIORGANOPHOSPHINODITHIOATES, PH(N)PB(S(2)PR(2))(4-N) - SYNTHESIS, SPECTROSCOPIC CHARACTERIZATION, AND NMR-STUDY OF THE REDISTRIBUTION DECOMPOSITION OF DIPHENYLLEAD(IV) DERIVATIVES

Tri- and diphenyllead(IV) diorganophosphinodithioates, Ph(n)Pb(S(2)PR(2))(4-n) (n = 2 and 3; R = Me, Et, Ph) were prepared by reacting the corresponding organolead(IV) chloride with the sodium or ammonium salt of the phosphinodithioic acid. The title compounds were investigated by infrared, H-1 and P-31 NMR, and mass spectroscopy, and possible structures were proposed. The diphenyllead(IV) phosphinodithioates, Ph(2)Pb(S(2)PR(2))(2), undergo decomposition on standing or on moderate heating, the least stable being the ethyl derivative. The process was monitored by using H-1 and P-31 NMR spectroscopy, and a reaction pathway leading to Ph(3)PbS(2)PR(2), Pb(S(2)PR(2))2, and R(2)P(S)SPh was established.