- Preparation and identification of dendritic carbosilanes containing allyloxy groups derived from 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (Me(CH2=CH)SiO)4 and 1,2-bis(triallyloxysilyl)ethane ((CH2=CHCH2O)3SiCH2)2
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Synthesis and characterization of dendritic macromolecules using 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (Me(CH2=CH)SiO)4 and 1,2-bis(triallyloxysilyl)ethane ((CH2=CHCH2O)3SiCH2)2 as core molecules and allylalcohol/dichloromethylsilane as a building block have been described. The dendrimers containing dichloromethylsilyl-groups (GS-1P~GS-4P and GH-1P~GH-3P) were produced by the hydrosilation process of double bonds in vinyl and allyloxy-groups in the GS-n and GH-n type dendrimers with dichloromethylsilane in the presence of a platinum catalyst (Pt/C). The GH-n and GS-n type dendrimers containing allyloxysilyl-groups were prepared by the reaction of GH-nP and GS-nP type dendrimers containing Si-Cl bonds and allylalcohol in the presence of TMED at room temperature. The purification of the prepared GH-n and GS-n type dendrimers used simple column chromatography. The yields of the prepared dendrimers have been obtained almost quantitatively. The analyses of the 1H- and 13C-NMR, MALDI mass spectra, and elemental analysis made it possible to obtain the pure and unified dendrimers. In additive manner, the molar absorbities of each generation of GH-n and GS-n type dendrimers show increasing character by the increasing number of double bonds.
- Kim, Chungkyun,Jeong, Younsook,Jung, Inkyung
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Read Online
- Process for Preparing Polysilylalkane
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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
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Paragraph 0056-0057; 0080-0082
(2020/04/17)
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- Synthesis of a Counteranion-Stabilized Bis(silylium) Ion
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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).
- Irran, Elisabeth,Klare, Hendrik F. T.,Oestreich, Martin,Roy, Avijit,Wang, Guoqiang,Wu, Qian
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supporting information
p. 10523 - 10526
(2020/04/30)
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- Process for Preparing Polysilylalkane
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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
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Paragraph 0071-0073
(2016/11/02)
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- Process for Preparing Polysilylalkane
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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
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Paragraph 0071; 0072
(2016/10/31)
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- Multifunctional thiols from the highly selective reaction of mercaptoalcohols with chlorosilanes
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Multifunctional thiols were synthesized by the selective reaction of chlorosilanes with mercaptoalcohols. Reaction of the mercaptoalcohols through the thiol group was not observed. Utilizing this method, thiols of varying structural diversity were prepared.
- Jennings, Abby R.,Son, David Y.
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p. 3467 - 3469
(2013/06/04)
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- SILYL SUBSTITUTED 1,4-DISILACYCLOHEXANE DERIVATIVES AND PREPARATION METHOD THEREOF
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The present invention relates to novel 1,4-disilacyclohexane derivatives and a preparation method thereof. More particularly, the invention provides a method for preparing 1,4-disilacyclohexane derivatives with a hexagonal ring structure at high yield through double silylation of an organosilane compound and a vinyl silane compound having an unsaturated double bond using quaternary organophosphonium salts as a catalyst. According to the present invention, tris(silyl)ethanes having three silyl groups in one molecule can be prepared at the same time and the catalyst can be recovered after reaction. Thus, the method is economical and enables mass-production of 1,4-disilacyclohexane derivatives and tris(silyl)ethanes which are precursors of organic-inorganic hybrid materials.
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Page/Page column 3-4
(2011/05/08)
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- [Bu4P]+Cl--catalyzed reactions of trichlorosilane and dichloromethylsilane with vinyltrichlorosilane: New synthetic method for 1,1,4,4-tetrachloro-2,5-bis(trichlorosilyl)-1, 4-disilacyclohexane compounds
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[Bu4P]+Cl--catalyzed reactions of trichlorosilane and dichloromethylsilane with vinyltrichlorosilane gave 1,1,4, 4-tetrachloro-2,5-bis(trichlorosilyl)-1,4-disilacyclohexane (1) and 1,1,4,4-tetrachloro-2,5-bis(methyldichlor
- Hong, Soon Hyun,Hyun, Sang Il,Jung, Il Nam,Han, Won-Sik,Kim, Min-Hye,Yun, Hoseop,Nam, Suk-Woo,Kang, Sang Ook
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experimental part
p. 3054 - 3057
(2010/10/04)
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- Fixed-Bed Hydrosilylation Catalyst Complexes and Related Methods
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The invention includes a fixed-bed catalyst complex that includes (i) a metal carbene catalyst, wherein the metal is platinum, and (ii) a catalyst support that includes one or more of silica, alumina and/or glass. The invention provides a fixed-bed catalyst complex that includes a catalyst complex including a carbene chosen from those represented by at least one of Formulae (I), (II), (III), and (IV): Where the vales of X and R1 to R7 are specifically defined. The complex also includes a catalyst support that comprises silica, related reaction products, and related reaction systems.
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Page/Page column 5
(2010/12/29)
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- A novel catalyst containing a platinum complex in polyethylene glycol medium supported on silica gel for vapor-phase hydrosilylation of acetylene with trichlorosilane or trimethoxysilane
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Hydrosilylation of acetylene with trichlorosilane or trimethoxysilane was carried out using a vapor-phase flow reactor with use of tetraammineplatinum(II) chloride in polyethylene glycol medium supported on silica gel as a catalyst, which is an active and thermally stable supported liquid-phase catalyst prepared readily from easily available materials, tetraammineplatinum(II) chloride, polyethylene glycol and silica gel.
- Okamoto, Masaki,Kiya, Hironari,Yamashita, Hiromi,Suzuki, Eiichi
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p. 1634 - 1635
(2007/10/03)
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- PROCESS FOR PREPARING ORGANOCHLOROSILANES BY DEHYDROHALOGENATIVE COUPLING REACTION OF ALKYL HALIDES WITH CHLOROSILANES
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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.
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- Process for preparing organochlorosilanes by dehydrohalogenative coupling reaction of alkyl halides with chlorosilanes
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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.
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- Process for the preparation of halogenated 1,2-disilaethanes
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A process for the preparation of halogenated 1,2-disilaethanes of the general formula X3?nRnSi—CHR1CHR1—SiRnX3?n??(I) in which R may be identical or different and denotes a hydrogen atom or a monovalent optionally substituted hydrocarbon radical having 1 to 40 carbon atom(s) per radical, R1may be identical or different and denotes a hydrogen atom or a monovalent optionally substituted hydrocarbon radical having 1 to 40 carbon atom(s) per radical, X denotes a halogen atom and n denotes 0, 1 or 2, wherein halogenated 1,2-disilaethenes of the general formula X3?nRnSi—CR1═CR1—SiRnX3?n??(II) in which R, R1, X and n have the meaning stated above therefor, are reacted with hydrogen in the presence of promoting catalysts. The product is produced in high yield and purity.
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- Dehydrohalogenative coupling reaction of organic halides with silanes
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The present invention relates to methods for making the compounds of formula I which is a dehydrohalogenative coupling of hydrochlorosilanes of formula II with organic halides of formula III in the presence of a Lewis base catalyst. R3CH2SiR1Cl2??(I) HSiR1Cl2??(II) R2CH2X??(III) In formulas I and II, R1represents a hydrogen, chloro, or methyl; in formula III, X represents a chloro or bromo; in formula III, R2can be selected from the group consisting of a C1-17alkyl, a C1-10fluorinated alkyl with partial or full fluorination, a C1-5alkenyl groups, a silyl group containing alkyls, (CH2)nSiMe3-mClmwherein n is 0 to 2 and m is 0 to 3, aromatic groups, Ar(R′)1wherein Ar is C6-14aromatic hydrocarbon, R′ is a C1-4alkyl, halogen, alkoxy, or vinyl, and q is 0 to 5, a haloalkyl group, (CH2)pX wherein p is 1 to 9 and X is a chloro or bromo; or an aromatic hydrocarbon, Ar CH2X wherein Ar is C6-14aromatic hydrocarbon and X is a chloro or bromo. in formula I, R3is the same as R2in formula III and further, R3can also be (CH2)pSiR1Cl2or ArCH2SiR1Cl2when R2in formula III is (CH2)pX or ArCH2X, because of the coupling reaction of X with the compound of formula II.
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- Gas-phase reactions of hexachlorodisilane with chloroform, carbon tetrachloride, and Di- and tetrachloroethylenes
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Gas-phase reactions of hexachlorodisilane with chloroalkanes (CHCl3 and CCl4) and chloroalkenes (ClCH=CHCl and Cl2C=CCl2) are studied. Dichlorosilylenes generated from Si2Cl6 insert into the C-Cl bonds in chloroalkanes; with chloroalkenes, insertion into the C-Cl bonds occurs along with cyclo-addition to the C=C bonds.
- Chernyshev,Komalenkova,Kapitova,Bykovchenko
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p. 1113 - 1116
(2007/10/03)
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- Novel alkoxysilanes
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Novel alkoxysilanes of the general formula: STR1 wherein letter a is equal to 2 or 3, b is equal to 0, 1, 2 or 3, and n is an integer of from 2 to 10 are useful agents for controlling curing reaction of addition type curable silicone compositions.
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- Synthesis and Characterization of Simple α-Sila- and α,ω-Disilaalkanes: Precursors for the CVD Production of Amorphous Silicon a-SiC:H
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Preparative methods have been explored for the synthesis of small, volatile polysilaalkanes, which could serve as starting materials for the production of amorphous silicon a-SiC:H.High yield pathways have been developed for H3SiCH2CH2SiH3 and H3SiCH2CH2CH2SiH3.These compounds can be converted into symmetrically halogen-functional derivatives through the reactions with SnCl4 or Br2.The homologous H3SiCH2CH2SiH2CH3 has also been prepared and halogenated, starting from the corresponding vinylsilane via the hydrosilylation route.Allylsilanes were the source of the synthesis of H3SiCH2CH=CH2, CH3SiH2CH2CH=CH2, SiH2(CH2CH=CH2)2, SiH2(CH2CH2CH2SiH3)2, or HSi(CH2CH2CH2SiH3)3.Methylated derivatives are also available. - Some physical and spectroscopic properties of the new compounds have been investigated.In particular, NMR data were collected and used for an assessment of structure and isomerism. - Key words: Disilaalkanes, Silanes, Amorphous Silicon, Hydrosilylation
- Schmidbaur, Hubert,Doerzbach, Cornelia
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p. 1088 - 1096
(2007/10/02)
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