994-28-5Relevant academic research and scientific papers
Syntheses de 3-silyl et de 3-germyl 1-sila et 1-germacyclopent-3-enes
Boukherroub, Rabah,Manuel, Georges
, p. 155 - 162 (1993)
The synthesis of allylic sila (and germa) cyclopentenes containing an Et3M (M=Si, Ge) group in vinylic position is described. 1-Germacyclopent-3-enes 3-silylated (IIIa) and 3-germylated (IIIb) result from 1,4-cycloaddition of GeI2 to the corresponding 2-m
Selective reduction of a C–Cl bond in halomethanes with Et3GeH at nanoscopic Lewis acidic Aluminium fluoride
Mei?ner, Gisa,Feist, Michael,Braun, Thomas,Kemnitz, Erhard
, p. 234 - 241 (2017/09/12)
The selective activation of C–Cl bonds of hydrochlorofluoromethanes and chloromethanes at moderate reaction conditions using ACF in a combination with Et3GeH is presented. The reactions of the chloromethanes (CH3Cl, CH2Cl2, CHCl3 and CCl4) in the presence of Et3GeH and ACF as catalyst led to the activation of only one C–Cl bond resulting in the hydrodechlorination. Friedel-Crafts reactions with benzene as solvent are suppressed by Et3GeH. A selective hydrodechlorination of hydrochlorofluoromethanes was achieved, because a transformation of a C–F bond into a C–H bond by the combination of ACF with Et3GeH did not occur. Supporting PulseTA experiments illustrated the interaction between the solid catalyst and Et3GeH, the solvent benzene or CH2Cl2.
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.
New stable germylenes, stannylenes, and related compounds. 1. Stable germanium(II) and tin(II) compounds M(OCH2CH2NMe2)2 (M = Ge, Sn) with intramolecular coordination metal-nitrogen bonds. Synthesis and structure
Zemlyansky, Nikolay N.,Borisova, Irina V.,Kuznetsova, Marianna G.,Khrustalev, Victor N.,Ustynyuk, Yuri A.,Nechaev, Mikhael S.,Lunin, Valery V.,Barrau, Jacques,Rima, Ghassoub
, p. 1675 - 1681 (2008/10/08)
New stable monomeric germanium(II) and tin(II) compounds M(OCH2CH2NMe2)2 (M = Ge (1); M = Sn(2)), stabilized by two intramolecular coordination M←N bonds and containing no bulky groups on the metal atoms, were synthesized. The molecular and crystal structures of these compounds, and that of the previously synthesized compound (ArO)2Sn (3; Ar = 2,4,6-(Me2NCH2)3C6H2), were determined by X-ray diffraction analysis. The electronic structures of 1 and 2 were studied by the DFT method.
Redox reactions of GeII and SnII dihalides with triethylsilane and triethylgermane
Nosov,Koroteev,Egorov
, p. 1325 - 1328 (2007/10/03)
Dihalogermylenes, dihalostannylenes, and their complexes (EI2, ECl2?dioxane, and (CO)5W=ECl2?THF, where E = Ge or Sn), unlike organylgermylenes, are not inserted at the Si-H (Ge-H) bond of triethylsilane (triethylgermane). The reactions of SnI 2, ECl2?dioxane, and (CO)5W=ECl 2?THF (E = Ge or Sn) with Et3E′H (E′ = Si or Ge) occur as redox processes. Depending on the nature of the reagents, the reactions afford products of oxidative coupling (Et3SiSiEt 3) and/or haloiodination (Et3SiX and Et3GeX) of triethylsilane (triethylgermane). The proposed mechanism of these reactions involves the electron transfer to form radical-ion pairs.
Selective synthesis of chlorohydrogermanes from mono-, di-, and trihydrogermanes
Ohshita, Joji,Toyoshima, Yutaka,Iwata, Arihiro,Tang, Heqing,Kunai, Atsutaka
, p. 886 - 887 (2007/10/03)
Treatment of hydrogermanes, R4-nGeHn (R = Hex, Et, Ph, n = 1-3), with 2 equiv of CuCl2 in ether at room temperature or in toluene under reflux led to selective replacement of an H-Ge bond with a Cl-Ge bond, giving the corresponding chlorohydrogermanes, R4-nGeHn-1Cl, selectively.
Synthesis and structure of oligomeric dimesitylgermyl-substituted carbodiimides; characterization of higher oligomers
Dahrouch, Mohamed,Rivière-Baudet, Monique,Satgé, Jacques,Mauzac, Monique,Cardin, Christine J.,Thorpe, James H.
, p. 623 - 629 (2008/10/08)
New cyclic oligomers of dimesitylgermylene carbodiimides (Mes2GeNCN)n (n = 3 (1) and 4 (2)) were synthesized by reactions of dimesityldichlorogermane with either cyanamide in the presence of triethylamine or lithium cyanamide. The re
Organogermanium dendrimers
Huc, Vincent,Boussaguet, Paul,Mazerolles, Pierre
, p. 253 - 260 (2007/10/03)
The first organogermanium dendrimers were synthesized by using divergent and convergent routes. The principal reactions used for these syntheses are hydrogermylation or hydrozirconation-transmetalation. These dendrimers were characterized by their IR, su
Investigation of the reaction of bis(triethylgermyl)cadmium with titanium tetrachloride
Lomakova, I.V.,Patrikeeva, N. B.,Domrachev, G. A.,Petrov, B. I.
, p. 1242 - 1244 (2007/10/02)
The reaction between (Et3Ge)2Cd and TiCl4 in the presence of α,α'-bipyridyl afforded a compound with a Ge-Cd-Ti group.This compound was characterized by IR and ESR spectroscopy.Thermal decomposition of this compound at 130 and 160 deg C and its interaction with gaseous HCl were studied.A novel complex, (Et3Ge)2Cd*bpy, was obtained as a by-product of the reaction, and some its physicochemical characteristics were determined.Based on the experimental results, a scheme for the interaction of (Et3Ge)2Cd with TiCl4 has been suggested. - Key words: mixed organo-Cd, Ti compounds.
