18171-50-1Relevant academic research and scientific papers
Synthesis of a Counteranion-Stabilized Bis(silylium) Ion
Irran, Elisabeth,Klare, Hendrik F. T.,Oestreich, Martin,Roy, Avijit,Wang, Guoqiang,Wu, Qian
, p. 10523 - 10526 (2020)
The preparation of a molecule with two alkyl-tethered silylium-ion sites from the corresponding bis(hydrosilanes) by two-fold hydride abstraction is reported. The length of the conformationally flexible alkyl bridge is crucial as otherwise the hydride abstraction stops at the stage of a cyclic bissilylated hydronium ion. With an ethylene tether, the open form of the hydronium-ion intermediate is energetically accessible and engages in another hydride abstraction. The resulting bis(silylium) ion has been NMR spectroscopically and structurally characterized. Related systems based on rigid naphthalen-n,m-diyl platforms can only be converted into the dications when the positively charged silylium-ion units are remote from each other (1,8 versus 1,5 and 2,6).
METHOD FOR THE DEHYDROGENATION OF DICHLOROSILANE
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Paragraph 0093, (2021/06/22)
Dichlorosilane and trichlorosilane are dehydrogenated at elevated temperature in the presence of an ammonium or phosphonium salt as a catalyst, and a halogenated hydrocarbon or hydrogen halide. The method may be used to synthesize organochlorosilane.
Process for Preparing Polysilylalkane
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Paragraph 0056-0057; 0084-0086, (2020/04/17)
Polysilylalkane according to the present invention is represented by following formula. The present invention has an advantage that bis(silyl)alkanes or tri(silyl)alkanes can be manufactured in a high yield by dehydrochlorination with a small amount of catalyst by using a silane compound having a dichloro organic matter or a dichloromethyl group.COPYRIGHT KIPO 2020
Process for Preparing Polysilylalkane
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Paragraph 0072; 0074-0076, (2016/11/02)
According to the present invention, polysilylalkane is represented by chemical formula 3. In chemical formula 3, m is equal to n, and n is equal to zero; and R^3 is a chloromethyl group. In the case of R^4 is H, -SiMe_2Cl, -SiMe_3, -SiMeCl_2, and -SiCl_3, R^3 is equal to -SiCl_3. In the case of R^4 is H, and R^5 is equal to R^6 and R^6 is equal to Me, or R^5 is equal to Me and R^6 is equal to Et, R^3 is -SiCl_3. In the case of R^4 is H, R^5 is equal to -CH_2SiCl_3, and R^6 is Me, R^3 is equal to -SiCl_3. In the case of R^4 is H, R^5 is equal to R^6 and R^6 is equal to -CH_2SiCl_3, R^3 is equal to Et, SiMe_2Cl, -SiMeCl_2, and -SiCl_3, and m is an integer of zero to nine. The manufacturing method is capable of manufacturing bis(silyl)alkane or tri(silyl)alkane in a high yield with a small amount of a catalyst.COPYRIGHT KIPO 2016
Process for Preparing Polysilylalkane
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Paragraph 0071; 0072; 0074; 0075, (2016/10/31)
A polysilyalkane according to the present invention is presented by a formula. Here, m=n=0, R^3 is chloro, and methyl group; when R^4 is H, -SiMe_2Cl, -SiMe_3,-SiMeCl_2, -SiCl_3, R^3=-SiCl_3; R^4 is H, R^5=R^6=Me or R^5=Me, when R6=Et, R^3-SiCl_3; R^4 is H, R^5= -CH_2SiCl_3, when R^6 is Me, R^3=-SiCl_3; R^4 is H, when R5=R6=-CH_2SiCl_3, R^3=Et, SiMe_2Cl, -SiMeCl_2, -SiCl_3, and m is integer number of 0-9.COPYRIGHT KIPO 2015
PRODUCTION METHOD FOR LINEAR AND CYCLIC TRISILAALKANE
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Page/Page column 6, (2011/04/19)
The present invention relates to a preparation method for a linear or cyclic trisilaalkane which is a substance useful in the preparation of polycarbosilane and silicon carbide precursors. Linear or cyclic trisilaalkane and organic trichlorosilane derivatives can be synthesized simultaneously and in high yield by reacting bis(chlorosily)methane having a Si—H bond, either alone or together with an organic chloride, using a quaternary organic phosphonium salt compound as a catalyst. Further, since the catalyst can be recovered after use, the present invention is very economical and is thus effective for mass-producing precursors for organic/inorganic hybrid substances.
Processes for manufacturing organochlorosilanes and dipodal silanes and silanes made thereby
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Page/Page column 3; 6, (2010/02/10)
Processes are provided for producing organchlorosilanes and dipodal silanes in which an organic halide or alkene or chloralkene is reacted with a hydridochlorosilane in the presence of a quarternary phosphonium salt catalyst by providing sufficient heat to effect a dehydrohalogenative coupling reaction and/or a hydrosilylation reaction and venting the reaction to control reaction pressure and to remove gaseous byproducts from the reaction. The processes are preferably continuous using a catalyst in fluid form at reaction pressures not exceeding about 600 psi. The reactions may be carried out substantially isothermally and/or isobarically, for example in a plug flow reactor or continuous stirred tank reactor. The processes may produce novel silylated compounds including 1,2-bis(trichlorosilyl)decane or 1,2-bis(trimethoxysilyl)decane.
PROCESS FOR PREPARING ORGANOCHLOROSILANES BY DEHYDROHALOGENATIVE COUPLING REACTION OF ALKYL HALIDES WITH CHLOROSILANES
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, (2008/06/13)
The present invention relates to a process for preparing organochlorosilanes and more particularly, to the process for preparing organochlorosilanes of formula I by a dehydrohalogenative coupling of hydrochlorosilanes of formula II with organic halides of formula III in the presence of quaternary phosphonium salt as a catalyst to provide better economical matter and yield compared with conventional methods, because only catalytic amount of phosphonium chloride is required and the catalyst can be separated from the reaction mixture and recycled easily, wherein R1 represents hydrogen, chloro, or methyl; X represents chloro or bromo; R2 is selected from the group consisting of C1-17 alkyl, C1-10 fluorinated alkyl with partial or full fluorination, C2-5 alkenyl, silyl containing alkyl group represented by (CH2)nSiMe3-mClm wherein n is an integer of 0 to 2 and m is an integer of 0 to 3, aromatic group represented by Ar(R′)q wherein Ar is C6-14 aromatic hydrocarbon, R′ is C1-4 alkyl, halogen, alkoxy, or vinyl, and q is an integer of 0 to 5, haloalkyl group represented by (CH2)pX wherein p is an integer of 1 to 9 and X is chloro or bromo, and aromatic hydrocarbon represented by ArCH2X wherein Ar is C6-14 aromatic hydrocarbons and X is a chloro or bromo; R3 is hydrogen, C1-6 alkyl, aromatic group represented by Ar(R′)q wherein Ar is C6-14 aromatic hydrocarbon, R′ is C1-4 alkyl, halogen, alkoxy, or vinyl, and q is an integer of 0 to 5; and R4 in formula I is the same as R2 in formula III and further, R4 can also be (CH2)pSiR1Cl2 or ArCH2SiR1Cl2, when R2 in formula III is (CH2)pX or ArCH2X, which is formed from the coupling reaction of X—(CH2)p+1—X or XCH2ArCH2X with the compounds of formula II; or when R2 and R3 are covalently bonded to each other to form a cyclic compounds of cyclopentyl or cyclohexyl group, R3 and R4 are also covalently bonded to each other in the same fashion.
Process for preparing organochlorosilanes by dehydrohalogenative coupling reaction of alkyl halides with chlorosilanes
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, (2008/06/13)
The present invention relates to a process for preparing organochlorosilanes and more particularly, to the process for preparing organochlorosilanes of R4R3CHSiR1Cl2(I) by a dehydrohalogenative coupling of hydrochlorosilanes of HSiR1Cl2(II) with organic halides of R2R3CHX (III) in the presence of quaternary phosphonium salt as a catalyst to provide better economical matter and yield compared with conventional methods, because only a catalytic amount of phosphonium chloride is required and the catalyst can be separated from the reaction mixture and recycled easily.
