Organolead oxides and hydroxides

The organolead oxides and hydroxides in Table 285 are prepared by the following methods. 

By rxn. of Me4Pb with ROH, followed with cold H2O R = Me, Et, i-Pr, i-Bu (I678). 

RCSCH - Me3PbC1CR R = H, CH2 CH, Ph (I9I7), BuOCHMeOCH2, Bu0CHMe02C, MesSiOCHMe, EtaSnOCHMe (2773)- 

PhOH + molecular sieve in CCI4 - MesPbOPh, rxn. suitable for anal. detn. (3 2). 

Triethyllead Hydroxide (M-567) PbCeHieO EtaPbOH Synth. By rxn. of Et4Pb with ROH, followed by cold H2O R = Me, Et, i-Pr, i-Bu (I678), with air under UV irradiation, in 12% yield (662), with O3 at -78  

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II Neutralization reaction of organolead oxide and hydroxide RgPbO and R3PbOH with ... 

Listing of organolead oxides and hydroxides continues in Table 285. 

This reaction is not useful for preparing trialkyllead(IV) alkoxides because the organolead oxides or hydroxides are less readily available, and decarboxylation is more difficult, but phenylmercury(II) alkoxides can be made in similar way from phenylmer-cury(II) hydroxide or oxide ... 

Lead enters surface water from atmospheric fallout, run-off, or wastewater. Little lead is transferred from natural minerals or leached from soil. Pb ", the stable ionic species of lead, forms complexes of low solubility with major anions in the natural environment such as the hydroxide, carbonate, sulfide, and sulfate ions, which limit solubility. Organolead complexes are formed with humic materials, which maintain lead in a bound form even at low pH. Lead is effectively removed from the water column to the sediment by adsorption to organic matter and clay minerals, precipitation as insoluble salt (the carbonate, sulfate, or sulfide) and reaction with hydrous iron, aluminum, and manganese oxides. Lead does not appear to bioconcentrate significantly in fish but does in some shellfish such as mussels. When released to the atmosphere, lead will generally occur as particulate matter and will be subject to gravitational settling. Transformation to oxides and carbonates may also occur. 

A. Preparation and Reactivity of Organolead Oxides, Hydroxides, and Alkoxides. ... 

Organolead carboxylates containing a lead oxide (Pb-O-Pb) and hydroxide (Pb-O-H) entity are compiled in Table 295 Organolead carboxylates supposedly having a carboxylate and alkoxide group linked to one lead atom are reported in Subchapter... 

Until recently only a few compounds possessing a Pb—N bond have been known [review up to 1963 (174)], mainly imido and sulfonamido compounds which were prepared by reacting the acidic N—H compounds with organolead hydroxides or oxides (Table XIII), i.e.. 

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