Lead tetraphenyl

In small portions at a time, add 200 cc. of water, faintly acidulated with hydrochloric acid. Collect the dark precipitate on a Buchner funnel and dry it thoroughly. Place the dark solid in a flask with a reflux condenser and boil with 100 cc. of benzene. Filter off the benzene through a folded filter, leaving the solid in the flask. Repeat the extraction with benzene several times. Combine the filtrates and concentrate to a volume of about 75 cc. On cooling, lead tetraphenyl separates from the solution in colorless needles which melt at 222° ... 

Trimethylphenol gives the 2-arylated cyclohexa-3,5-dienone derivative. The ortho and para phenylation of phenol with lead tetraphenyl is reported in a US patent53). Depending on the reaction conditions, 2-phenyl-, 2,6-diphenyl- and even... 

By the action of arsenic trichloride on lead tetraphenyl in toluene solution ... 

Lead tetraphenyl, Pb(CJl5)4.—body was first prepared from sodium-lead alloy, bromobenzene, and ethyl acetate by heating the mixture to boiling in an oil-bath for sixty hours. It is much more... 

Lead tetraphenyl crystallises in small, white needles, M.pt. 224° to 225° C., which distil unchanged at about 240° C. ... 

Lead diphenyl di-iodide.—Lead tetraphenyl in chloroform solution is treated with a solution of iodine in the same solvent, until a permanent colour of iodine remains. The solution on evaporation gives golden yellow needles of the iodide. The same result is obtained by the action of potassium iodide on lead diphenyl dinitrate. The compound melts at 101 to 103 C., and is easily soluble in chloroform, alcohol, or benzene. When its alcoholic solution is treated with silver nitrate, silver iodide and lead diphenyl dinitrate are formed. 

Lead diphenyl iodate is a crystalline powder, formed by heating together lead tetraphenyl and iodic acid in xylene solution. It is insoluble ill the usual organic solvents. 

Carbon-Metallic Linkages. Compounds containing such linkages may be cleaved by hydrogenolysis to give the metal and hydrocarbons. Thus, lead tetraphenyl on treatment with hydrogen at a pressure of 1,000 psig and a temperature of 200°C yields lead and benzene. Tin tetraethyl on Rimilar treatment is converted to tin and ethane. 

Diphenylbromobismuthine, (C6H5)2BiBr, may be obtained by the foregoing methods, or by the interaction of lead tetraphenyl and bismuth bromide ... 

Koton, M. Catalytic decomposition of lead tetraphenyl. J. Amer. Chem. Soc. 56, 1118 (1934). 

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