Triphenyllead Chloride

Chloromethyltriphenyllead compounds, Ph3PbR (R = CC13 or CHC12), have been proposed as products of the decomposition of the triphenyllead chloroacetates in refluxing pyridine on the basis of equivocal spectroscopic data (37). Trichloromethyltriphenyllead was isolated for use as a source of dichlorocarbene from the reaction of triphenyllead chloride and sodium trichloroacetate in dme at 85° C (35) [Eq. (33)]. 

Treatment of triphenyllead chloride with the lithium compound 7 afforded first the intramolecular [4 + 2]-coordinated tetraarylplumbane 8 as colorless crystals in 70% yield. Repeated treatment of 8 with triphenyllead chloride finally furnished the pentacoordinated compound 9 in the form of its triphenyllead chloride adduct 10 in 69% yield, also as colorless crystals. The compounds 8 and 10 were characterized by a complete NMR dataset, and by X-ray crystallography (Scheme l).23... 

Tris-(triorganylmetal)phosphines are the products from the reactions between triphenyltin, triphcnylgermanium and triphenyllead chlorides and phosphine The reactions proceed in benzene solution in the presence of... 

Recently, redistribution reactions between phenyllead compounds have been used to prepare triphenyllead chloride from tetraphenyllead and diphenyllead dichloride 202>, and, using mercury acetate in acetic acid as a catalyst, phenyllead triacetate from diphenyllead diacetate and lead tetraacetate, and diphenyllead diacetate from tetraphenyllead and lead tetraacetate 325>. The mercury acetate catalyst is notable in that it does not catalyze the redistribution of alkyllead compounds. 

Lead speciation (inorganic lead, trimethyllead chloride, triethyllead chloride, and triphenyllead chloride) has been performed by Al-Rashdan et al. [26]. Despite previous use of a gradient elution (10% to 70% methanol in water) with inductively coupled plasma atomic emission spectrometry (ICP-AES) detection, an isocratic elution was used with ICP-MS detection because gradient elution causes plasma instability. A 30% methanol/water mobile phase was used, along with a CI8 column, and the pH was optimized by using acetate buffer. 

Cadiot et al. reported a synthesis of triphenylallenylplumbane by reaction of propargylmagnesium bromide with triphenyllead chloride. Although the reaction was efficient (70% yield), it suffered from the necessary but tedious preparation of the triphenyllead chloride.158 In contrast, triphenylallenylplumbane can be easily prepared in 75-80% yields by reaction of in situ generated Ph3PbMgBr with propargyl bromide (Equation (129)).159... 

Dichlorobis(2,4-pentanedionato)titanium(IV), synthesis 10 Tris(2,4-pentanedionato)zirconium(IV) chloride, synthesis 11 Phenyllead(lV) azides (includes triphenyllead chloride and diphenyllead dichloride), synthesis 15 Diphenyl phosphorochloridite, synthesis 17 Mercapto derivatives of chlorocyclophosphazenes, synthesis 21 (Trichlorophosphoranylidene)amidophosphoryl dichloride, synthesis 22... 

In an attempt to prepare new dithiolate complexes Ph2PbCl2 was allowed to react with (NR4)2[Zn(MNT)2], giving Ph2Pb(MNT)2, which further reacts with (NR4)I to give (NR4)[Ph2Pb(MNT)2l]. Triphenyllead chloride reacts with (NR4)2[Zn(MNT)2] to give (Ph3Pb)2(MNT) which has symmetrical monodentate coordination of [MNT] (Pb—S 2.523, 2.580 A). ... 

The coupling of diorganolead dihalides with lithium and calcium has also been reported 300, 301) as well as that of triphenyllead chloride with tetrasodium nonaplumbide [Na4Pb9] 297). 

Triphenylgermanium bromide, 45B, 806 Triphenyllead bromide, 43B, 927 Triphenyltin bromide, 45B, 807 Triphenyllead chloride, 43B, 927 Triphenyltin chloride, 35B, 489... 

Triphenylsilyllithium reacts with triphenyllead chloride to form a regular 1 1 PbjCCeHs) Si2(C6H5)g phase (decomp.p. 189°C) [454]. 

This compound was discussed at the 1969 lUPAC Symposium on Macromolecular Chemistry in Moscow. It was prepared from reaction of triphenyllead chloride and j9-styrenylmagnesium chloride (eq. 1). It homopolymerized readily, more readily than styrene itself It also forms copolymers with styrene or methyl methacrylate in conversions of >25%, giving transparent plastic films (eq. 2). 

---