Organolead Compounds.

Leeper, Robert; Summers, Lawrence H.; Gilman, Henry

doi:10.1021/cr60167a004

Cited by 79 publications

(21 citation statements)

References 86 publications

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“…[1] Particularly noteworthy is the instability of all monoorganolead trihalides (RPbX 3 ), even well below 0 8 8C. [1] Particularly noteworthy is the instability of all monoorganolead trihalides (RPbX 3 ), even well below 0 8 8C.…”

mentioning

confidence: 99%

A Monoaryllead Trichloride That Resists Reductive Elimination

et al. 2018

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Transmetallation of Pb(OAc) with R Hg (1), followed by treatment with HCl in Et O, provided RPbCl (2), the first kinetically stabilized monoorganolead trihalide that resists reductive elimination under ambient conditions. The kinetic stabilisation relies on an intramolecularly coordinating O-donor substituent (R=6-Ph P(O)-Ace-5-). The gram-scale preparation of 2 was key for the synthesis of unsymmetrically substituted diaryllead dichlorides RR'PbCl (3 a, R'=Ph; 3 b, R'=4-MeOC H ; 3 c, R'=4-Me NC H ).

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confidence: 99%

A Monoaryllead Trichloride That Resists Reductive Elimination

et al. 2018

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“…In organometallic compounds, lead is predominantly present in oxidation state +IV . In contrast, examples of inorganic compounds of lead in oxidation state +IV are rare and compounds in the oxidation state +II are dominant, which is caused by the inert pair effect .…”

Section: Tetravalent Halides Of Germanium Tin and Leadmentioning

confidence: 99%

“…In organometallic compounds, lead is predominantly present in oxidation state + IV. [20] In contrast, examples of inorganic compounds of lead in oxidation state + IV are rare and compounds in the oxidation state + II are dominant, which is caused by the inert pair effect. [21] PbCl 4 is stable up to 0 8Ca nd is formed by treating chloroplumbic acid (H 2 PbCl 6 )w ith ammonium chloride and decompositiono ft he resulting (NH 4 ) 2 PbCl 6 to give PbCl 4 .…”

Section: Pbxmentioning

confidence: 99%

Halides of the Heavier Group 14 Homologues Germanium, Tin, and Lead—A Journey through Unusual Compounds and Oxidation States

Kunz

Schnepf

2018

Chemistry A European J

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Classical halides of the heavier Group 14 homologues germanium, tin, and lead are common precursors for the synthesis of exciting compounds, such as polyhedral clusters. To get access to larger metalloid cluster compounds of Group 14, the disproportionation reaction of metastable monohalide solutions, accessible through a preparative co‐condensation reaction, proved to be quite successful. As the identity of the subvalent halides within the metastable solutions were yet unknown the reaction course from a monohalide precursor to a metalloid cluster was mostly unidentified. This might change now, as a first subhalide cluster [Ge14Br8(Et3P)4] could be characterized, being the first trapped intermediate of the disproportionation reaction of Group 14 subhalides. All these aspects are included within this Minireview, together with a short historical overview, dealing with the development of the preparative co‐condensation technique out of the matrix isolation technique, being the essential first step of the synthesis of metastable monohalide solutions of the heavier Group 14 elements Ge and Sn.

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“…The di-and triethyllead halides conveniently serve as intermediates for the prep aration of other di-and triethyllead salts by a metathesis (23,45,83).…”

Section: Reaction With Inorganic Acidsmentioning

confidence: 99%

“…As a consequence, the reac tions of TEL have been widely investigated. However, there still remain many oppor tunities for worthwhile research in this field.The chemistry of organolead compounds in general has often been reviewed (58,113,120), notably by Calingaert (17), Krause (82), and most recently Gilman (45,83) and their coworkers: men who have contributed much of the important ex perimental work on the subject. Reviews in particular have been made by German and Russian workers (81, 131), but these are not readily accessible and are now out of date.…”

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confidence: 99%

Chemical Reactions of Tetraethyllead

Milde¹,

Beatty²

1959

Metal-Organic Compounds

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This report gives a compilation of the periodical and patent literature on the known chemical reactions of tetraethyllead (TEL). These are by no means con fined to antioxidant and antiknock effects. Of par ticular interest are those reactions wherein ethyl radicals, liberated from TEL by photolysis or pyrolysis, induce the polymerization, chlorination, or oxidation of other compounds. Many different diethyl-and triethyllead salts are readily obtained from the parent compound. TEL is used to prepare other organome tallic compounds, and its reaction with heavy metal chlorides produces Ziegler-type catalysts for the polymerization of olefins. In view of its ready avail ability, these relatively unexplored end uses for TEL constitute an area of considerable research potential.Tetraethyllead-commonly abbreviated to TEL-is the outstanding example of the simple or R n M type of organometallic compound of moderate chemical reactivity. It has been known for over 100 years, as it was one of the first of these compounds to be isolated, and it is now unique in industrial importance. As a consequence, the reac tions of TEL have been widely investigated. However, there still remain many oppor tunities for worthwhile research in this field.The chemistry of organolead compounds in general has often been reviewed (58,113,120), notably by Calingaert (17), Krause (82), and most recently Gilman (45,83) and their coworkers: men who have contributed much of the important ex perimental work on the subject. Reviews in particular have been made by German and Russian workers (81, 131), but these are not readily accessible and are now out of date.Considering the variety of chemical reactions into which TEL can enter, and its ready availability at a relatively low cost, there may well be good use for the follow ing compilation of the available information on these reactions. PhotolysisTEL is readily dissociated by light. The vapor shows continuous absorption in the ultraviolet with the formation of metallic lead and ethyl radicals, the latter being detected by the Paneth method (33, 103, 124) · Maximum absorption occurs at about 306

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Organolead Compounds.

Cited by 79 publications

References 86 publications

A Monoaryllead Trichloride That Resists Reductive Elimination

A Monoaryllead Trichloride That Resists Reductive Elimination

Halides of the Heavier Group 14 Homologues Germanium, Tin, and Lead—A Journey through Unusual Compounds and Oxidation States

Chemical Reactions of Tetraethyllead

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