Organoleads addition

A search is now in progress for less expensive organolead additives that would allow penetration of the several-billion-gallon-per-year market for automotive engine lubricants. New areas of application are also being investigated, such as in outboard engines for boats, where... 

For organolead compounds, demands for spedation already started with awareness of the toxicology of lead stemming from organolead additives in fuel. For gas... 

Organolead compounds with a carboxylic acid function bound to the alkyl group can be prepared by addition of Ph3PbOH to ketenes162 ... 

It is interesting to mention that PbCl2 is stable whereas PbCLj is thermodynamically unstable and decomposes at room temperature to yield PbCl2 and elemental CI2. On the other hand, organolead(IV) compounds have been prepared (and have been used extensively as fuel additives, such as PbEtq) whereas species like PbEt2 have yet to be prepared and are likely not possible, as they disproportionate to the more thermodynamically stable PbEt4 and solid Pb. This tendency is also reflected in the reaction enthalpies of the methyl... 

The vast majority of measurements of organolead compounds in the environment do not constitute evidence for biomethylation of lead. Most environmental organic lead comes from incomplete combustion or spillage of methyl- or ethyl-lead gasoline additives (viz tetraalkylleads or TALs). A literature search will produce several hundred TAL or ionic alkyllead results, but few of them are evidence for methylation in or by the environment. 

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