Sulfur organoleads

Examples of association resnlting from intermolecular sulfur organolead hypervalent interactions are rare and componnds snch as MeyPbSMe and Ph3PbSPh are monomeric in the solid state. The cyclic diorgano dithiolate 2,2-diphenyl-l,3,2-dithiaplnmbolan ° self-assembles in the solid state via intermolecular sulfur tin interactions into a onedimensional polymeric array. The intramolecular S Pb bond lengths amonnt to 2.52 and 2.49 A, and the intermolecnlar S Pb distances are 3.55 A. 

Lutidylbis(phosphoranosulfide) with M(N(SiMe3)2)2 (M = Sn, Pb) afforded 1,3-distannacyclobutane 314 and 1,3-diplumbacyclobutane 315 (100M1890), where coordination modes differ drastically the sulfur donor site is involved only in the organolead derivative. 

Improved rodent reflellants are also an important commercial goal. Dr. M. C. Henry and co-workers at the U.S. Army Laboratories at Natick, Massachusetts, are synthesizing organolead sulfur compounds for test in rodent repellant coatings for electrical cable sheathing. Field tests will be conducted by the U.S. Fish and Wildlife Service of the Department of the Interior. 

Effluents from the manufacture of Pb(CH3)4 can be treated with an alkali metal borohydride, e.g., NaBH4 at pH 8 to 11 to substantially reduce the level of dissolved lead compounds, like [Pb(CH3)3][145, 146]. Zn can also be used [147]. Liquid NH3 and toluene are used to remove solid NH4Clfrom the apparatus for producing Pb(CH3)4 by the NH3- or amine-catalyzed reaction of CH3CI with a PbNa alloy [148]. Stabilization of Pb(CH3)4, and of antiknock fluids containing Pb(CH3)4, is accomplished by addition of compounds, like toluene [149], xylene [141, 150], styrenes [151], naphthalenes [149, 151, 152], anthracenes [152], substituted phenols [141, 152 to 155], olefinic hydrocarbons [152], alcohols [141, 152], amines [155], hydroquinones [156], ethers [141], saturated or unsaturated carboxylic acids [141, 152], esters of phosphoric acid [152], or of sulfuric acid [157], or of sulfonic acids [141], imidazoles [158], alkyl halides and alkyl thiocyanates [141], or tall oil [159] see also Organolead Compounds , Vol. 2, Section 1.1.1.2, to be published. 

ORGANOLEAD COMPOUNDS WITH SULFUR SELENIUM AND TELLURIUM... 

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