1112-39-6Relevant articles and documents
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Kondo et al.
, p. 287,300 (1973)
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Dimethoxydimethylsilane from silicon atoms and dimethyl ether: A combined matrix-spectroscopic and density functional theory study
Maier, Guenther,Glatthaar, Joerg
, p. 3350 - 3363 (2003)
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.
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
Okazaki, Masaaki,Minglana, Jim Josephus Gabrillo,Yamahira, Nobukazu,Tobita, Hiromi,Ogino, Hiroshi
, p. 1350 - 1358 (2003)
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).
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Ojima,J. et al.
, p. C7 - C8 (1973)
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Synthesis of dialkoxydimethylsilanes and 2,2-dimethyl-1,3-dioxa-1- silacyclo compounds
Lin, Ji-Mao,Zhou, Ai-Min,Zhang, Hui,Hao, Ai-You
, p. 2527 - 2532 (1997)
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.
Dimethyldimethoxysilane preparation method
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Paragraph 0026-0033, (2019/02/08)
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.
Amorphous silicon: New insights into an old material
Spomer, Natalie,Holl, Sven,Zherlitsyna, Larissa,Maysamy, Fariba,Frost, Andreas,Auner, Norbert
, p. 5600 - 5616 (2015/03/30)
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).
