3005-32-1Relevant articles and documents
Reaction of organoelement hydrides R3EH (E = Si, Ge) with metal tert-butylate (M = Al, Ti)-tert-butyl hydroperoxide oxidative systems
Stepovik,Gulenova,Martynova,Skvortsov,Cherkasov
, p. 1098 - 1107 (2007/10/03)
Trialkyl(aryl)silanes and -germanes effectively react with metal (Al, Ti) tert-butylate-tert-butyl-hydroperoxide under mild conditions (room temperature, benzene or tetrachloromethane) mainly by the element-hydrogen bond. The character of the products depends on the nature of the element, the structure of the radical bound to it, and the solvent. The process is radical in nature. It includes the stages of formation of element-centered radicals and their reaction with the oxygen generated by the system. The intermediate organometallic peroxides can also acts as oxidants for the element (Si, Ge)-hydrogen bonds. 2005 Pleiades Publishing, Inc.
PdCl2 and NiCl2-catalyzed hydrogen-halogen exchange for the convenient preparation of bromo- and iodosilanes and germanes
Iwata, Arihiro,Toyoshima, Yutaka,Hayashida, Tsuyoshi,Ochi, Takahiko,Kunai, Atsutaka,Ohshita, Joji
, p. 90 - 95 (2007/10/03)
Bromination and iodination of hydrosilanes and germanes were studied. Treatment of hydrosilanes with an excess of ethyl, propyl, or allyl bromide in the presence of a catalytic amount of PdCl2 or NiCl2 gave bromosilanes in good to high yield by hydrogen-halogen exchange. By using methyl, propyl, or allyl iodide as the iodine source, similar iodination of hydrosilanes was readily performed. Halogenation of hydrogermanes also proceeded by similar treatment.
Microwave-assisted Lewis acid catalysis: Application to the synthesis of alkyl- or arylhalogermanes
Laurent, Régis,Laporterie, André,Dubac, Jacques,Berlan, Jacques
, p. 2493 - 2495 (2008/10/08)
Under microwave irradiation, alkyl- or arylhalogermanes RnGeX4-n (R = Et, Bu, Ph; X = Cl, Br) are obtained by redistribution reactions of R4Ge with GeX4. These experimental conditions permit the synthesis of such compounds in good yield in a few minutes at atmospheric pressure. The direct Friedel-Crafts germylation of benzene and toluene by germanium tetrachloride also has been performed, but yields were low.
Triorganogermanium Selenocarboxylates: Synthesis and Reactions
Kato, Shinzi,Ibi, Kazumasa,Kageyama, Hideki,Ishihara, Hideharu,Murai, Toshiaki
, p. 558 - 562 (2007/10/02)
A series of triphenylgermanium selenocarboxylates 3 were synthesized and characterized.The esters 3 are thermally stable, but labile towards moisture and oxygen.They react with arenesulfenyl chlorides and areneselenenyl bromides at room temperature to afford the corresponding acyl arenesulfenyl selenides and acyl aryl diselenides in moderate yields. Keywords: Triorganogermanium Selenocarboxylates, Aroyl Aryl Diselenides, Aroyl Arenesulfenyl Selenides
Chemistry of Germanium Atoms. II. Reactions of Thermally Evaporated Germanium Vapor with Organic Halides
Mochida, Kunio,Tashiro, Kumiko,Yoshida, Yasuhiro,Mizuno, Yasuhisa
, p. 1247 - 1250 (2007/10/02)
Thermally generated germanium atoms were found to react with organic halides by insertion into carbon-halogen bonds.The resulting germylenes abstracted halogens from organic halides to form trihalogermyl derivatives.Tetrahalogermanes were also formed by t
METHYLPHENYLTRIPHENYLGERMYLSILANES FONCTIONNELS OPTIQUEMENT ACTIFS. II. REACTIONS DE CLIVAGE DE LA LIAISON Si-Ge
Corriu, R. J. P.,Ould-Kada, S.,Lanneau, G. F.
, p. 39 - 50 (2007/10/02)
The cleavage of a silicon-germanium bond in the presence of organometallics has been studied on the optically active compounds MePh(X)SiGePh3 (X=H, OMe).Depending on the nature of the nucleophile, we obtained mixed products, corresponding to the formation of Ph3Ge-, transient radical-anions, or catalytic reactions.
THE CHEMICAL BEHAVIOUR OF COBALT-STABILIZED-CARBENES HAVING A TRISUBSTITUTED SILYL OR GERMYL LIGAND. STEREOSPECIFIC FORMATION OF BENZOYLSILANES FROM THE REACTION OF ORGANOSILYL-COBALT TETRACARBONYL DERIVATIVES WITH PHENYLLITHIUM
Cerveau, Genevieve,Colomer, Ernesto,Corriu, Robert J.P.,Young, J. Colin
, p. 31 - 45 (2007/10/02)
We report the chemical behaviour of cobalt-stabilized carbenes, R3M(CO)3CoC(OEt)R', and their parent anions, R3M(CO)3CoC(O-)R', where M = Si or Ge.The anions where M = Si, R' = Ph decompose thermally into the corresponding benzoylsilanes; when the silicon atom is chiral (R3 = MePh-1-Np) optically active R3SiCOPh is obtained with complete retention of configuration.
