- SILAETHENE II. DARSTELLUNG UND CHARAKTERISIERUNG VON 1,3-DISILACYCLOBUTANEN
-
1,3-Disilacyclobutanes of the types R1R2SiSiR1R2 are prepared (a) by ring synthesis from chloromethylchlorosilanes R1R2Si(CH2Cl)Cl, (b) by thermolysis of monosilacyclobutanes , and (c) by substitution of chlorine with alkyl groups in SiCl-containing 1,3-disilacyclobutanes, obtained by procedures (a) or (b).The compounds have been characterized by analytical and spectroscopic investigations.The synthetic methods are critically compared.
- Auner, N.,Grobe, J.
-
-
Read Online
- NOVEL ECO-FRIENDLY INSECTICIDES BASED ON SILICON COMPOUNDS AND PROCESS OF PREPARATION THEREOF
-
The present invention provides novel silicon-based compounds or salt thereof of general formula (I), wherein R1 and R2 Represent the Halogen, Hydrogen, alkyl, alkoxy or aryl group and R3, R4, R5 and R6 represents Chlorine or Hydrogen or hydroxyl group. The said compounds are biodegradable active insecticides. The invention also relates to process for the manufacture of said compounds and compositions containing them and their use.
- -
-
Page/Page column 13
(2018/08/26)
-
- Thermal chlorination of methyltrichlorosilane
-
The procedure for thermal chlorination of methyltrichlorosilane to chloromethyltrichlorosilane in a circulation flow system was developed. The yield of ClCH2SiCl3 was studied as influenced by the reaction temperature and the reactant ratio.
- Voronkov,Stankevich,Kukharev,Abzaeva
-
p. 800 - 803
(2007/10/03)
-
- REACTION OF HEXACHLORODISILANE WITH METHYLENE DICHLORIDE
-
Reaction of hexachlorodisilane with methylene dichloride at 400-520 deg C involves two consecutive-parallel reactions yielding chloromethyltrichlorosilane and bis(trichlorosilyl)methane.The ratios of the rate constants of these reactions and the maximal yield of the intermediate chloromethyltrichlorosilane have been determined at various temperatures.Side reactions that yield tris(trichlorosilyl)methane have been examined.
- Chernyshev, E. A.,Komalenkova, N. G.,Bykovchenko, V. G.,Kapitova, I. A.
-
p. 383 - 386
(2007/10/03)
-
- Synthetic Pathways to Simple Di- and Trisilylmethanes: Potential Starting Materials for the CVD Deposition of Amorphous Silicon a-SiC:H
-
Methods for the preparation of simple silaalkanes with a high content of silicon and hydrogen have been explored.Target molecules, like H3SiCH2SiH3 and HC(SiH3)3, may serve as precursor molecules for the production of photovoltaic elements through thermal or discharge (plasma) CVD processes.Among a variety of synthetic pathways, the reactions between HSiCl3 and HCCl3 in the presence of an amine (Benkeser reaction) and the direct synthesis from silicon and polychloromethanes proved most promising for large scale preparations.The CH2X2/KSiH3 metathesis is most useful on the laboratory scale. - The Grignard synthesis was employed for partly methylated homologues, like H3SiCH2SiH2CH3, H3SiCH2SiH(CH3)2, H3SiCH2Si(CH3)3, and related molecules.The magnesium reduction of CHBr3/SiCl4 and CHBr3/CH3SiCl3 mixtures serves best for the preparation of HC(SiCl3)3, which can be converted into HC(SiH3)3 using LiAlH4.Attempts to synthesize tetrasilylmethane via the same route, C(SiH3)4, led only to the formation of HC(SiH3)3. - Key words: Amorphous Silicon a-SiC:H, Disilylmethane, Trisilylmethane, Direct Synthesis, Polysilylmethanes
- Schmidbaur, Hubert,Ebenhoech, Jan
-
p. 1527 - 1534
(2007/10/02)
-