cas 593-91-9, BISMUTH TRIMETHYL | Articles data

Articles about 593-91-9Total 10 be found

The Dimethylbismuth Cation: Entry Into Dative Bi?Bi Bonding and Unconventional Methyl Exchange
The isolation of simple, fundamentally important, and highly reactive organometallic compounds remains among the most challenging tasks in synthetic chemistry. The detailed characterization of such compounds is key to the discovery of novel bonding scenarios and reactivity. The dimethylbismuth cation, [BiMe2(SbF6)] (1), has been isolated and characterized. Its reaction with BiMe3 gives access to an unprecedented dative bond, a Bi→Bi donor–acceptor interaction. The exchange of methyl groups (arguably the simplest hydrocarbon moiety) between different metal atoms is among the most principal types of reactions in organometallic chemistry. The reaction of 1 with BiMe3 enables an SE2(back)-type methyl exchange, which is, for the first time, investigated in detail for isolable, (pseudo-)homoleptic main-group compounds.
Braunschweig, Holger,Engels, Bernd,Fantuzzi, Felipe,Geist, Felix,Hanft, Anna,Lichtenberg, Crispin,Ramler, Jacqueline
p. 24388 - 24394
(2021)
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Palladium-catalyzed cross-coupling reaction of trialkylbismuthines with 2-haloazines and diazines
An efficient method for the cross-coupling reaction of primary trialkybismuth reagents with 2-haloazines and diazines is reported. The reaction functions with pyridines, pyrimidines, pyridazines and pyrazines and tolerates many functional groups. This method gives access to 2-alkylazines and diazines, a class of compounds which is important in medicinal chemistry.
Petiot, Pauline,Gagnon, Alexandre
p. 1615 - 1624
(2016/10/12)

LIVING RADICAL POLYMERIZATION PROMOTER
An organobismuth compound represented by the formula (1) and a method for preparing a living radical polymer using the organobismuth compound. In the formula (1), R1 to R3 each represent a C1-C8 alkyl group, an aryl group, a substituted aryl group, an aromatic heterocyclic group or a group represented by the formula (2) where at least one of R1 to R3 is a group represented by the formula (2), wherein R4 and R5 each represent a C3-C8 alkyl group, an aryl group or a substituted aryl group, and R6 to R8 each represent a hydrogen atom, a C1-C8 alkyl group, an aryl group or a substituted aryl group.
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Page/Page column 14; 15

(2009/12/27)

ORGANIC BISMUTH COMPOUND, METHOD FOR PRODUCING SAME, LIVING RADICAL POLYMERIZATION INITIATOR, METHOD FOR PRODUCING POLYMER USING SAME, AND POLYMER
An organobismuth compound represented by the formula (1) wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, amido, oxycarbonyl or cyano.
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Page/Page column 15

(2010/11/28)

Tetramesityldibismuthane, Bis(dimesitylbismuth)- and Bis(dimethylbismuth)chalcogenides
Reduction of Mes2BiBr with Na in liquid NH3 or with Cp2Co in THF or C6D6 gives Mes4Bi2 (1) as a red solid that reversibly becomes pink on cooling with liquid nitrogen.Oxidation of 1 in air, or reaction of Mes2BiBr with NaOH, gives (Mes2Bi)2O (2). (Mes2Bi)2S (3) and (Mes2Bi)2Se (4) are formed by reaction of Mes2BiBr with Na2S in water or with Na2Se in liquid NH3, respectively. (Mes2Bi)2Te (5) is obtained by reaction of 1 with Te or by reaction of Mes2BiBr with Na2Te.Reactions of Me4Bi2 with Se or Te produce (Me2Bi)2Se (6) and (Me2Bi)2Te (7).With equimolar amounts of p-benzoquinone tetramethyldibismuthane yields 1,4-C6H4(OBiMe2)2 (8). 1H NMR data and mass spectra of 1-8, UV-VIS data of 1-4, and the crystal structures of 2*0.5C2H5OH, 3 and 4 are reported. - Keywords: Tetramesityldibismuthane, Bis(diorganylbismuth)chalcogenides, 1,4-Bis(dimethylbismuthoxo)benzene
Breunig, Hans Joachim,Ebert, Klaus Heinz,Schulz, Reinhold Ernst,Wieber, Markus,Sauer, Ingbert
p. 735 - 744
(2007/10/02)

Reaction of Sodium-dimethyl-bismuthide with α,ω-Dibromoalkanes and Halogenomethyl-trimethyl-metallanes (M = Si, Ge, Sn)
The bis(dimethylbismuth)alkanes (CH3)2Bi(CH2)nBi(CH3)2 (n = 3, 4, 5) were prepared by reaction of NaBi(CH3)2 in liquid ammonia with dibromoalkanes Br(CH2)nBr (n = 3, 4, 5).Thermolysis of bis(dimethylbismuth)butane and bis(dimethylbismuth)pentane leads to the cyclic compounds 1-methyl-bismacyclopentane and 1-methyl-bismacyclohexane.Reaction of NaBi(CH3)2 with halogenomethyl(trimethyl)metallanes XCH2E(CH3)3 (E = Si, Ge, Sn; X = Hal) produce compounds of the type (CH3)2BiCH2E(CH3)3. - Keywords: α,ω-Bis(dimethylbismuth)alkanes, 1-Methyl-bismacycloalkanes, Dimethylbismuth-methylen-(trimethyl)metallanes
Wieber, Markus,Rudolph, Klemens
p. 739 - 743
(2007/10/02)

Synthesis of Mixed Substituted Triorganobismuthanes
Sodium dimethylbismuthide, generated from dimethylbismuth bromide and sodium in liquid ammonia, was treated with alkyl halides to produce dimethylalkylbismuthanes, Me2Bi(alk) (alk = C2H5, n-C3H7, n-C4H9, C3H5, i-C3H7) as thermolabile liquids in yields ranging from 70 to 90percent.With methylene chloride bis(dimethylbismutho)methane, (Me2Bi)2CH2, was obtained.Aryldimethylbismuthanes, (aryl)BiMe2, were prepared by treating dimethylbismuth bromide in THF with elemental lithium (-78 deg C) and subsequent reaction with aryl halides (aryl = 4-C6H4CH3, 4-C6H4OCH3, 2,4,6-C6H2(CH3)3).At 90 deg C in an N2-stream, the thermolabile compounds react quantitatively to form diarylmethylbismuthanes, (aryl)2BiMe and Me3Bi. - Keywords: Dimethylalkylbismuthanes, Bis(dimethylbismutho)methane, Aryldimethylbismuthanes, Diarylmethylbismuthanes
Wieber, Markus,Sauer, Ingbert
p. 1476 - 1480
(2007/10/02)

A Synthesis of Tetramethyldibismuthane and its Cleavage to Bis(dimethylbismuth)oxide or Sulfide and Phenyldimethylbismuthane, Respectively
Tetramethyldibismuthane, Me4Bi2 was prepared in high yields by reducing Me2BiBr with sodium in liquid ammonia.The compound reacts quantitatively with equimolar amounts of oxygen or sulfur to yield the corresponding (Me2Bi)2O and (Me2Bi)2S.By cleavage of Me4Bi2 with PhLi, PhBiMe2 was obtained; the latter is also available in better yields by the reaction of Me2BiBr with PhLi. - Key words: Tetramethyldibismuthane, Bis(dimethylbismuth)oxide, Bis(dimethylbismuth)sulfide, Phenyldimethylbismuthane, Lithiumdimethylbismuthane
Wieber, Markus,Sauer, Ingbert
p. 887 - 889
(2007/10/02)

Preparation and properties of dibismuthines
Tetramethyldibismuthine, 1, tetraisopropenyldibismuthine, 15, 1,1′-bibismolane, 16, and tetrakis(2-methyl-1-propenyl)dibismuthine, 17, have been prepared from the reaction of the corresponding tertiary bismuthines with sodium in liquid ammonia followed by treatment with 1,2-dichloroethane. Tetraphenyldibismuthine, 4, was prepared by an analogous route from diphenylbismuth chloride. While all the dibismuthines are red in solution, 1, 15, and 16 freeze to blue solids. Compounds 4 and 17 form red solids. The Raman, UV, and mass spectra of the dibismuthines are discussed. The dibismuthines thermally decompose to form bismuth metal and corresponding tertiary bismuthine. The reactions of tetramethyldibismuthine with iodine, bromotrichloromethane, benzyl bromide, hydrochloric acid, and butyllithium have been explored. The reactions afford products in which the Bi-Bi bond has been cleaved.
Ashe III, Arthur J.,Ludwig Jr., Edward G.,Oleksyszyn, Josef
p. 1859 - 1866
(2008/10/08)

A reinvestigation of paneth's violet compound. the synthesis of tetramethyldlbismuthine
TetramethyMibisrnuthine was prepared from the reaction of trimethyibismuthine with sodium in liquid tmmonia followed by treatment with 1,2-dichloroethaoe. Like tstramethyldistibine it shows thermochromic properties on freezing.
Ashe III, Arthur J.
p. 1408 - 1408
(2008/10/08)