- Dimethoxydimethylsilane from silicon atoms and dimethyl ether: A combined matrix-spectroscopic and density functional theory study
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The reaction between silicon atoms and dimethyl ether (6) has been studied in an argon matrix at 10 K and in solid dimethyl ether (6) at temperatures up to 80 K. In the initial step, a triplet n-adduct T-5 is formed between a silicon atom and 6. The next step needs photochemical activation. Depending on the relative dimethyl ether/argon ratio, the photoproduct is either dimethylsilanone (1) or singlet methoxymethylsilylene (S-2), which, in the presence of an excess of 6, exists as a dimethyl ether complex 8 of silylene S-2. Longer irradiation transforms dimethyl ether addition compounds S-8-t/ S-8-c into dimethoxydimethylsilane (7). If irradiation is applied directly during cocondensation of silicon atoms with 6, the only detectable products are 8 and 7. Upon further irradiation of the pure dimethyl ether matrix, the rest of 8 is also photoisomerized, and dimethoxydimethylsilane (7) is observed exclusively. The structural elucidation of all new species is based on comparison of the experimental observations with density functional theory calculations. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
- Maier, Guenther,Glatthaar, Joerg
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- Heteroorganic betaines 4. Photolysis and thermolysis of betaines containing the +P - C - Si - S- structural fragment
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Phololysis and thermal decomposition of betaines R3P - CR1R2 - SiR3R4 - S- (1) follows two main pathways: (a) a Corey - Chaykovsky type reaction with elimination of Ph3P and generation of silathiirane R1R2C - SiR3R4 - S (2) and (b) a retro-Wittig type reaction accompanied by elimination of R3P=CR1R2 and generation of silanethione R3R4Si=S (3). Highly reactive compounds 2 and 3 undergo subsequent transformations to give derivatives of tetrahydro-1,4-dithia-2,5-disilin, 1,3-dithia-2,4-disilolane, and phosphonium salts of symm-tetraorganodisilthiane dithiolates [Ph3P+CHR1R2]2[(R3R4SiS-)2S]. The structures of the compounds obtained were established by X-ray diffraction analysis and multinuclear NMR spectroscopy.
- Borisova,Zemlyanskii,Shestakova,Khrustalev,Ustynyuk,Chernyshev
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- Synthesis, structure, and reactivity of hydridobis(silylene)ruthenium(IV)- xantsil complexes (xantsil = (9,9-dimethylxanthene-4,5-diyl)bis(dimethylsilyl)) - A stabilized form of key intermediates in the catalytic oligomerization- deoligomerization of hydrosilanes
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Ru {K2(Si,Si)-xantsil}(CO)(η6-C6H 5CH3) (1) was found to be a catalyst for oligomerization-deoligomerization of HSiMe2SiMe3 to give H(SiMe2)nMe (n = 1-8 at 90°C for 2 days). Treatment of 1 with HSiMe2SiMe2OR (R = Me, f-Bu) led to quantitative formation of Ru{κ3(O,Si,Si)-xantsil}(CO)(H) {(SiMe2...O(R)...SiMe2)} (R = Me (2a), t-Bu (2b)), which also worked as a catalyst for oligomerization-deoligomerization of HSiMe2SiMe3. Based on these experimental results, a mechanism involving silyl(silylene) intermediates was proposed for the oligomerization-deoligomerization of HSiMe2SiMe3. Complex 2a reacted with MeOH in toluene-d8 to give Ru{κ 2(Si,Si)-xantsil}(CO)(η6-toluene-d8) and Me2Si(OMe)2 with evolution of H2. Under a CO atmosphere, 2a was smoothly converted to its CO adduct Ru{κ 2(Si-Si)-xantsil}(CO)2(H){(SiMe2...O(Me) ...SiMe2)} (3).
- Okazaki, Masaaki,Minglana, Jim Josephus Gabrillo,Yamahira, Nobukazu,Tobita, Hiromi,Ogino, Hiroshi
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- Deoligomerization of siloxanes with dimethyl carbonate over solid-base catalysts
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Hexamethyldisiloxane and hexamethylcyclotrisiloxane were almost completely deoligomerized with dimethyl carbonate over alumina-supported potassium fluoride catalyst to form methoxytrimethylsilane (85% yield) and dimethoxydimethylsilane (94% yield), respec
- Okamoto,Miyazaki,Kado,Suzuki
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- Insertion of pyridine into an iron-silicon bond: Structure of the product Cp*(CO)Fe{η3(C,C,C)-C5H5NSiMe 2NPh2}
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Heating a toluene solution of Cp*(CO)(C5H 5N)FeSiMe2NPh2 led to insertion of pyridine into the iron-silicon bond to form Cp*(CO)Fe{η3(C,C,C)-C 5H5NSiMe2NPh2}.
- Iwata, Masatoshi,Okazaki, Masaaki,Tobita, Hiromi
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- Synthesis of dialkoxydimethylsilanes and 2,2-dimethyl-1,3-dioxa-1- silacyclo compounds
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In the presence of iodine, magnesium reacts with alcohols to give magnesium alkoxides, which are treated with octamethylcyclotetrasiloxane to produce dialkoxydimethylsilanes. Similarly, magnesium reacts with 1,3, 1,4 and 1,5 diols and then with octamethylcyclotetrasiloxane, producing 2, 2- dimethyl-1 3-dioxa-2-silacyclo compounds.
- Lin, Ji-Mao,Zhou, Ai-Min,Zhang, Hui,Hao, Ai-You
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- METHOD FOR PREPARING ALKYLALKOXYSILANES
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A method is useful for preparing alkylalkoxysilanes, such as alkylalkoxysilanes, particularly dimethyldimethoxysilane. The method includes heating at a temperature of 150°C to 400°C, ingredients including an alkyl ether and carbon dioxide, and a source of silicon and catalyst. The carbon dioxide eliminates the need to add halogenated compounds during the method.
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Paragraph 0038
(2020/03/29)
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- Dimethyldimethoxysilane preparation method
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The invention discloses a dimethyldimethoxysilane preparation method, which comprises: continuously adding dimethyldichlorosilane into the methanol solution of sodium methoxide, and carrying out alcoholysis. According to the present invention, the preparation method has advantages of mild reaction conditions, easy operation, low equipment input, convenient scale production, high product yield andlow chlorine content in the product.
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Paragraph 0026-0033
(2019/02/08)
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- Ethyl phenyl dimethoxy silane and its preparation method
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The invention relates to the field of organic chemistry. In order to solve dual problems of equipment loss and environmental pollution generated in synthesis of ethyl phenyl dimethoxysilane by virtue of an alcoholysis method, the invention provides ethyl phenyl dimethoxysilane and a preparation method thereof. Ethyl phenyl dimethoxysilane is prepared from ethyl trimethoxysilane and chlorobenzene as raw materials by virtue of a sodium condensation method. The reaction conditions are mild, no harms to the environment and equipment are caused and the process is simple and is very suitable for large-scale industrial production.
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Paragraph 0023; 0024
(2017/01/02)
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- Amorphous silicon: New insights into an old material
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Amorphous silicon is synthesized by treating the tetrahalosilanes SiX4 (X=Cl, F) with molten sodium in high boiling polar and non-polar solvents such as diglyme or nonane to give a brown or a black solid showing different reactivities towards suitable reagents. With regards to their technical relevance, their stability towards oxygen, air, moisture, chlorine-containing reaction partners RCl (R=H, Cl, Me) and alcohols is investigated. In particular, reactions with methanol are a versatile tool to deliver important products. Besides tetramethoxysilane formation, methanolysis of silicon releases hydrogen gas under ambient conditions and is thus suitable for a decentralized hydrogen production; competitive insertion into the MeO-H versus the Me-OH bond either yields H- and/or methyl-substituted methoxy functional silanes. Moreover, compounds, such as MenSi(OMe)4-n (n=0-3) are simply accessible in more than 75% yield from thermolysis of, for example, tetramethoxysilane over molten sodium. Based on our systematic investigations we identified reaction conditions to produce the methoxysilanes MenSi(OMe)4-n in excellent (n=0:100%) to acceptable yields (n=1:51%; n=2:27%); the yield of HSi(OMe)3 is about 85%. Thus, the methoxysilanes formed might possibly open the door for future routes to silicon-based products. Amorphous silicon is easily synthesized from tetrahalosilanes SiX4 (X=Cl, F) and molten sodium in different solvents. Reactivity studies prove the resulting materials as versatile tools for the formation of technical important silanes, such as the silicon chloro-, alkoxy-, and methylalkoxy-substituted derivatives (see figure; bl=black, br=brown).
- Spomer, Natalie,Holl, Sven,Zherlitsyna, Larissa,Maysamy, Fariba,Frost, Andreas,Auner, Norbert
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p. 5600 - 5616
(2015/03/30)
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- METHOD FOR PREPARING AN ORGANO-FUNCTIONAL SILANE
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A process includes reacting an organometallic cuprate and a silicon precursor in the presence of a solvent. The process produces a reaction product including an organo-functional silane.
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Paragraph 0025
(2014/05/24)
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- METHOD OF PRODUCING A HYDROLYZABLE SILICON-CONTAINING COMPOUND
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The present invention provides a safe, inexpensive, and high yield means of producing a hydrolyzable silicon-containing compound, e.g., an organooxysilane and the like. A compound (A) represented by the general formula R1-O-R2 wherein R1 represents a C4-30, substituted or unsubstituted, tertiary alkyl group or aralkyl group and R2 represents a C1-30, substituted or unsubstituted, monovalent hydrocarbyl group or acyl group, is reacted in the presence of a Lewis acid catalyst with a halosilane (B) represented by the general formula R3mSiX4-m wherein R3 represents the hydrogen atom or a C1-30 substituted or unsubstituted monovalent hydrocarbyl group, X is independently bromine or chlorine, and m represents an integer from 0 to 3.
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Page/Page column 17; 20
(2012/07/14)
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- Practical conversion of chlorosilanes into alkoxysilanes without generating HCl
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Alcohol-free: A versatile, efficient, and practical synthesis of alkoxysilanes without generation of HCl involves the reaction of chlorosilanes with unsymmetrical ethers in the presence of a Lewis acid (see scheme). The reaction proceeds through selective cleavage of C-O bonds and is superior to conventional processes. Industrially feasible reagents are used and only one by-product results. Copyright
- Wakabayashi, Ryutaro,Sugiura, Yasushi,Shibue, Toshimichi,Kuroda, Kazuyuki
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supporting information; experimental part
p. 10708 - 10711
(2011/12/05)
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- Studies of the Henry reaction catalyzed by Cu-O and Zn-O complexes with dimethoxysilane-bridged derivatives
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Dimethyldimethoxysilane, methylphenyldimethoxysilane, and diphenyldimethoxysilane have been synthesized by a one-step, simple method and used as catalysts in the Henry reaction with Cu(OAc)2.H2O and Zn(OAc)2.2H2O, affording 60-96% conversion under the optimum catalytic conditions. Springer Science+Business Media B.V. 2010.
- Mei, Luo,Yang, Han Bing,Song, Shu
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body text
p. 181 - 191
(2011/10/13)
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- Preparation Of Adsorbents For Purifying Organosilicon Compounds
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A method for purifying organosilicon precursor compounds is provided. It includes preparation of the adsorbent with a treating compound. The thus-treated adsorbents can be used to remove impurities such as organic impurities and moisture from a composition containing an organosilicon containing compound. In this manner, it is able to purify organosilicon precursors (or solutions containing organosilicon precursors) without inducing decomposition of the organosilicon precursor.
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(2008/06/13)
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- METHOD FOR PRODUCING ORGANOSILANES
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The invention relates to a method for producing organosilanes by reacting amorphous silicon with appropriate alcohols while forming Si-C compounds. In order to produce organosilanes RnSi (OR) 4-n, X-ray amorphous silicon, which can be produced, for example, by reducing silicon tetrahalides with metals in an inert apolar solvent, are reacted with alcohols while heating.
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(2008/06/13)
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- PREPARATION OF ORGANOSILANE ESTERS
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The present invention relates to a specific process for preparing organosilane esters of the formula (I) and a composition comprising more than 98% by weight of organosilane esters of the formula (I) and less than 2.0% by weight of at least one hydrocarbon and to the use of such a composition as precursor for producing a layer or film having a dielectric constant of 1 κ≤ 4.
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Page/Page column 14-18
(2008/06/13)
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- Heteroorganic betaines 3. * Reactions of betaines containing the +P-C-Si-S- fragment
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The [Ph3P+-CMe2-SiMe2-SEt]Br- salt was prepared by the reaction of betaine Ph3P+-CMe2SiMeR-S- (1a: R = Me) with EtBr. Acetylation of betaine 1a or Et3P+-CHMeSiMe2-S- (2a) afforded 2,2,6-trimethyl-1,3-dioxa-2-silacyclohex-5-ene-4-thione Me2SiOC(=S)CH=C(Me)O or the [Et3P+-CHMeSiMe2Cl]Cl- salt depending on the reagent ratio. The reactions of betaines 1a,b (1b: R = Ph) or 2 with compounds (R3Sn)2X (X = O or NMe) can be used for the generation of silanones [RMeSi=O] and silaneimines [RMeSi=NMe] in solutions. The reactivity of betaines Ph3P+-CHR1SiMeR2-S- (R1 = H or Me and R2 = Me or Ph) is determined by the equilibrium between the zwitterionic and ylide Ph3P=CR1SiMeR2SH tautomers that exist in solutions.
- Borisova,Zemlyanskii,Shestakova,Khrustalev,Ustynyuk,Chernyshev
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p. 933 - 941
(2007/10/03)
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- Process for preparing low-chloride or chloride-free alkoxysilanes
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A process for preparing an alkoxysilane with an acidic chloride content of less than 10 ppm by weight, comprising: reacting a chlorosilane with an alcohol in a water-free and solvent-free phase to form a product mixture containing alkoxysilane and residual acidic chloride, with removal of resultant hydrogen chloride from the product mixture, then adding liquid or gaseous ammonia, in an amount corresponding to a stoichiometric excess, based on the content of acidic chloride, to form an ammonia-containing product mixture, treating the ammonia-containing product mixture at a temperature between 10 and 50 DEG C., wherein the ammonia and acidic chloride undergo neutralization, to form a crude product, and optionally, then separating off a salt formed in the course of neutralization, from the crude product, and recovering the alkoxysilane by distilling the crude product.
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- Method for decomposing polysiloxane
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When a polysiloxane or siloxane is contacted with a mixture which comprises an orthoester, a compound having an active hydrogen-containing group and an acid catalyst, it is easily decomposed even at room temperature to provide a silicon compound having a lower molecular weight such as an alkoxysilane.
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- METHOD OF RECOVERING ORGANOALKOXYSILANE FROM POLYORGANOSILOXANE
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Disclosed are a process which comprises reacting a high molecular weight polyorganosiloxane or a composition containing the same with an alkoxysilane and/or a partially hydrolyzed condensate thereof at a temperature of lower than 300 °C in the presence of an alcoholate compound and recovering the resulting organoalkoxysilane and, in addition thereto, at least one of a distillable polyorganosiloxane low molecular weight compound, a non-volatile liquid polyorganosiloxane and a silica; and a process which comprises reacting a high molecular weight polyorganosiloxane or a composition containing the same with an alcoholate compound at a temperature of 50 to 150 °C in an anhydrous state and recovering the resulting distillable polyorganosiloxane low molecular weight compound and, in addition thereto, at least one of an organoalkoxysilane and a non-volatile liquid polyorganosiloxane.
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- Thermally-induced 1,2-shifts to convert olefins to carbenes: Does silicon do it? if so, why not carbon?
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Thermal isomerization of olefins to carbenes via a 1,2-silyl shift was examined by both experiment and theory. No evidence of this rearrangement was found for acyclic vinylsilanes, nor could electronic assistance by silicon be identified in cis, trans isomerizations. Serendipitous synthesis of a 2,4-dimethylene-1,3-disilacyclobutane allowed a kinetic examination of its gas-phase, thermal ring expansion to a 2-methylene-1,3-disilacyclopentene. The Arrhenius parameters (log A = 12.48, Eact = 54.09 kcal/mol) are the first to be reported for an olefin-to-carbene rearrangement. The analogous all-carbon system failed to ring expand. Ab initio calculations revealed that this was opposite to any predictions which would be made from ring strain considerations. Calculations showed that for silyl migration the transition state was late and was actually the carbene, while for carbon migration the TS was early and considerably higher in energy than the resulting carbene. The 2-methylene-1-silacyclobutane rearrangement (ref 5) was reexamined to find that reversible ring opening to a 1,4-diradical occurred at temperatures below those required to ring expand via a carbene TS.
- Barton, Thomas J.,Lin, Jibing,Ijadi-Maghsoodi, Sina,Power, Martin D.,Zhang, Xianping,Ma, Zhongxin,Shimizu, Hideaki,Gordon, Mark S.
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p. 11695 - 11703
(2007/10/03)
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- Consecutive Reactions of Diethoxydimethylsilane and Triethoxymethylsilane with Methoxide Ions in Methanol Solution
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The consecutive reactions of (CH3)2Si(OC2H5)2 and CH3Si(OC2H5)3 with methoxide ions were investigated in methanol solutions.The reverse transesterification reactions with ethoxide ions could be neglected in both cases since the concentration of ethoxide in methanol solution was assumed to be low due to the fast equilibrium reaction C2H5O- + CH3OH C2H5OH + CH3O-.The progress of the reactions was followed by monitoring the formation of ethanol with a Fourier-transform infrared spectrometer.All rate constants were determined at 295 K.The reactions between the dialkoxydimethylsilanes and methoxide ions were assumed to consist of two consecutive steps that can be represented by the net reaction; (CH3)2Si(OC2H5)2 + 2 CH3O- -> (CH3)2(OCH3)2 + 2 C2H5O-.The two consecutive rate constants were established as 1.93 +/- 0.12 M-1 s-1 and 1.00 +/- 0.12 M-1 s-1, respectively.The consecutive rate constants for the reactions between the trialkoxymethylsilanes and methoxide ions can be written according to the total reaction; CH3Si(OC2H5)3 + 3 CH3O- -> CH3Si(OCH3)3 + 3 C2H5O-.The three rate constants corresponding to each consecutive step were established as 1.12 +/- 0.09 M-1 s-1, 0.82 +/- 0.10 M-1 s-1, and 0.51 +/- 0.06 M-1 s-1, respectively.
- Jaeglid, Ulf,Lindqvist, Oliver
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- 1,3-disilacyclobutanes and the method for producing thereof
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The present invention relates to a process for preparing 1,3-disilacyclotutanes by pyrolyzing alkoxytrisilaalkaness at a temperature of from 400° C. to 800° C. at the atmospheric pressure or under the vacuum. This is a new synthetic route of 1,3-disilacyclobutanes which employs readily available starting materials without using alkaline metals or magnesium, affords very good yields, produces very clean product mixtures separable by distillation, and tolerates functionality on silicon.
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- KINETICS OF THE ACID-CATALYSED SOLVOLYSIS OF SIX-MEMBERED CYCLOSILAZOXANES CONTAINING TWO SILAZANE BONDS
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The solvolysis of N,N'-diphenyl-1,1,3,3,5,5-hexamethyl-1,3,5-trisila-2,4-diaza-6-oxacyclohexane (II) in methanol/water in the presence of an acetate buffer is a two-step, pseudo-first-order, process.Both steps are subject to general acid catalysis and their catalytic rate constants have been determined spectrophotometrically.The ring cleavage is faster than that of analogous cyclosilazoxanes containing a single silazane bond (I), but the catalytic mode, substituent effects, and the solvent isotope effect indicate a close mechanistic similarity for the solvolysis of I and II.
- Lasocki, Zygmunt,Witekowa, Malgorzata
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- MARKED MEDIUM EFFECTS ON THE SUBSTITUTION AND THE ADDITION-REARRANGEMENT-EJECTION REACTIONS OF (HALOMETHYL)SILANES WITH METHOXIDES
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Reactions of methoxides with (halomethyl)silanes at silicon are facilitated by aprotic solvents and cation separation.
- Kreeger, R. L.,Menard, P. R.,Sans, E. A.,Shechter, H.
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p. 1115 - 1118
(2007/10/02)
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- THE BEHAVIOR OF ALKOXIDES WITH ALLYL(CHLOROMETHYL)DIMETHYLSILANES AND (CHLOROMETHYL)DIMETHYLVINYLSILANE; THE ABILITIES OF ALLYL AND VINYL GROUPS TO MIGRATE FROM PENTACOORDINATE SILICON
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Sodium methoxide in tetrahydrofuran attacks silicon in allyl(chloromethyl)-dimethylsilane and in (chloromethyl)dimethylvinylsilane with displacement of chloride and 1,2-migration of the allyl and the vinyl groups to give 1-(3-butenyl)methoxydimethylsilane and allylmethoxydimethylsilane.
- Sans, E. A.,Shechter, H.
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p. 1119 - 1122
(2007/10/02)
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- Hetero-?-Systems, 9. About the Relationships between Silaethenes and Methylsilylenes
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Silaethenes 1 and the isomeric methylsilylenes 2 are separately existing species, but can readily be interconverted in an argon matrix via a photochemically induced 1,2-H shift.In case of the thermal excitation in the gas phase examples for both directions have been dedected spectroscopically: the isomerisation of a silaolefin into the corresponding silylene (1d -> 2d) and the formation of a silene from a silylene (2f -> 1f).
- Maier, Guenther,Mihm, Gerhard,Reisenauer, Hans Peter,Littmann, Dieter
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p. 2369 - 2381
(2007/10/02)
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- Element-Organic Amine/Imine Compounds, XXIII. Rotamers of Aminophosphanes and Aminophosphoranes
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The diazaphosphasiletidines 3a - h can be synthesized from R2Si(NCR3Li)2 and Cl2PNR1R2 (1) as well as from (2) and MNR1R2 (R = CH3).At ambient temperature they show hindered rotation about the P - NR1R2 bond. 3g is separated as a pair of E/Z-rotamers, whose structure has been elucidated by NMR and X-ray analyses.The kinetically measured P - N rotation barriers (ΔG* ca. 30 kcal/mol) are until now the highest that have been measured.The isomerization of 3g (E) -> 3g(Z) (P - N rotation, P inversion, or both) is a P - N rotation which has been established by the synthesis and the NMR spectroscopically measured rearra ngement of (3i) (R = CH3, four isomers).The interaction of 3a - h with sulfur, selenium, and methyl iodide gives 4 - 6a - h.Below 0 deg C they all show hindered rotation about the P - NR1R2 bond. 4 and 5 are suitable for the study of the structure dependence of 1H NMR ASIS effects.The oxidation of 3g(E/Z) to the isomers 4g - 6g(E/Z) occurs with retention of configuration.These compounds show significant differences with respect to their thermal stability and their reaction with methanol.The comparison of the ΔG* values of the P - N rotation barriers of 3 - 6 shows that the steric influence of the exo-amino substituents R1 and R2 is most important.The E/Z equilibrium of the unsymmetrically substituted compounds gives evidence that the two ground states of P - N rotation are mostly sterically, possibly also electronically.
- Scherer, Otto J.,Puettmann, Michael,Krueger, Carl,Wolmershaeuser, Gotthelf
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p. 2076 - 2124
(2007/10/02)
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- LE PROBLEME DE LA CONJUGAISON A TRAVERS UN ATOME DE SILICIUM ?-LIE DANS LES SYSTEMES SILA-2 BUTADIENIQUES
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The chemical behaviour of sila-2 butadienes, formed as transient intermediates either by thermolysis or by photolysis of various 1-vinylsilacyclobutanes, was studied with respect to hydroxylated compounds of different pKa values.Two mechanisms can explain the nature of the products obtained on the co-thermolysis of the cyclic compounds with phenol, one with 1-silacyclobut-1-ene intermediate and the other involving an allylic silicenium cation.In both hypothetical mechanisms, the 2-silabutadienes behave as a conjugated system since they lead either to cycloaddition or to (1,2)- and (1,4)-electrophilic addition.This evidence for a conjugation phenomenon through a silicon atom is supported by the calculation of the delocalisation energies of butadiene and 2-silabutadiene.
- Bertrand, G.,Manuel, G.,Mazerolles, P.,Trinquier, G.
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p. 2875 - 2880
(2007/10/02)
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- HETEROGENEOUS REACTIONS VII. FURTHER STUDIES ON THE HETEROGENEOUS GAS/SOLID REACTIONS OF SOLID ALKOXIDE BASES WITH VAPORIZED CHLOROMETHYLDIMETHYLHALOSILANES
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The results of the heterogeneous gas/solid reactions of chloromethyldimethylchloro (and fluoro)silane with solid lithium, sodium and potassium methoxide in the temperature range from 80-160 deg C are presented and discussed.Reaction with lithium methoxide serves as a clean, efficient high yield synthesis of chloromethyldimethylmethoxysilane without the complicating factors of side products or solvent to separate.The reactions of both the sodium and potassium methoxides lead to the displacement of halogen from silicon and to the displacement of the chloromethyl group.New evidence for the mechanism of the latter reaction is presented.With the potassium compound methylethyldimethoxysilane also is formed and a carbene, sila-olefin addition mechanism is suggested.Surprisingly, lithium t-butoxide did not react with the chlorosilane but did react with the fluorosilane to produce chloromethyldimethyl-t-butoxysilane in high purity and excellent yield.The reaction with potassium t-butoxide was more complicated, giving substitution for halogen and the chloromethyl group at silicon as well as t-butyl methyl ether.
- Hopper, Steven P.,Tremelling, Michael J.,Goldman, Emma W.
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p. 247 - 256
(2007/10/02)
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