1520-78-1Relevant articles and documents
A utility for organoleads: Selective alkyl and aryl group transfer to tin
Arias-Ugarte, Renzo N.,Pannell, Keith H.
, p. 1703 - 1708 (2018/02/09)
Me4Pb and Ph4Pb readily transfer methyl or phenyl groups to an equivalent molar ratio of tin(iv) chlorides in the order SnCl4 > MeSnCl3 > Me2SnCl2 > Me3SnCl, often in a selective manner. Me3PbCl and Ph3PbCl specifically transfer a single methyl/phenyl group under the same reaction conditions to produce recovered yields in >75%. Specific transfer of 2 methyl groups from PbMe4 can be achieved at elevated temperatures and/or a 2:1 molar ratio Pb:Sn.
Trifluoromethylsubstituierte Plumbane. Synthese, Eingeschaften und NMR-Spektren der Verbindungen (CF3)nPbR4-n (n = 1-3) und (CF3)nPbR3-nX (n = 1, 2; R = Me, Et; X = Hal)
Eujen, R.,Patorra, A.
, p. 57 - 75 (2007/10/02)
Trifluoromethylated derivatives of lead, (CF3)nPbR4-n (n = 1-3; R = CH3, C2H5), have been prepared by a stepwise halide/CF3 exchange from (CF3)nPbR3-nX (n = 0-2) and donor-stabilized (CF3)2Cd.Upon treatment of CF3PbR3 and (CF3)2PbR2 with halides under mild conditions, selective cleavage of the Pb-C(H) bond and formation of the corresponding alkyl(trifluoromethyl)haloplumbanes were achieved, whereas with (CF3)3PbMe only (CF3)2PbMeX was obtained.The direct exchange of alkyl and trifluoromethyl groups was observed for the systems PbR4/(CF3)nE (E = Hg, Ge, Sn), (CF3)4Sn being the most efficient CF3 transfer reagent.All compounds were characterized by vibrational, mass and multinuclear NMR spectroscopy.The NMR coupling constants nJ(207Pb-E) (E = 19F, 1H, 13C), which vary strongly with solvents and substituents, have been determined along with their absolute sings.Linear correlations found between 1J(207Pb-CF3) and 2J(207Pb-F) or 2J(207Pb-F) and 2J(119Sn-F) of homologous trifluoromethylated stannanes, respectively.
Tris(trimethylsilyl)methyl-lead Oxinates: Their Solvolysis, Redistribution, and Reductive Elimination Reactions
Glockling, Frank,Gowda, N. M. Nanje
, p. 2191 - 2196 (2007/10/02)
The complex PbMe2(ox) (where ox = the anion of 8-hydroxyquinoline) is stable to boiling ethanol over short periods, but on prolonged heating undergoes redistribution and reductive elimination reactions yielding Pb(ox)2, PbMe3(ox), PbMe3, and 8-methoxyquinoline.By contrast, when PbCl2Me is treated with 8-hydroxyquinoline at pH ca. 10 in methanol, ethanol, or aqueous dioxan the bis(trimethylsilyl)methyl complex PbMe(ox)2 (1) is formed together with SiMe3(OR) (R = H, Me, or Et) rather than the expected tris(trimethylsilyl)methyl complex.Refluxing (1) in ethanol or aqueous dioxan results in further nucleophilic displacement of SiMe3 groups yielding , successively, PbMe(CH2SiMe3)(ox)2 (2) and PbMe2(ox)2 (3).These cleavage reactions occur in competition with disproportionation and reductive elimination processes, the final products derived from (3) being Pb(ox)2, PbMe4, PbMe3(ox), and 8-methoxyquinoline.The corresponding 8-hydroxy-2-methylquinolinate complexes are also examined.
Sulfur-Nitrogen Compounds, IX Preparation and Spectroscopical Characterization of Some Sulfur Diimines with Elements of Main Group IV
Brands, G.,Golloch, A.
, p. 568 - 573 (2007/10/02)
Compounds of the sulfur(IV) diimines with elements of the main group IVb were prepared.Spectroscopic behaviour and the scope and limitations of preparing sulfurdiimines from amines and N3S3Cl3 are discussed. - Key words: Sulfurdiimines, Trithiazyltrichloride
