1172-76-5

Usage

Chemical Properties

white crystalline powder

InChI:InChI=1/C26H26Si2/c1-27(23-15-7-3-8-16-23,24-17-9-4-10-18-24)28(2,25-19-11-5-12-20-25)26-21-13-6-14-22-26/h3-22H,1-2H3

Upstream product

• 144-79-6 chloromethyldiphenylsilane 
• 776-76-1 methyldiphenylsilane 
• 18080-97-2 (chloromethyl)diphenylsilane 
• 4518-98-3 1,1,2,2-tetrachloro-1,2-dimethyldisilane 
• 100-58-3 phenylmagnesium bromide 
• 15288-62-7 1,2-dichloro-1,1,2,2-tetraphenyldisilane 
• 75-16-1 methylmagnesium bromide 
• 7205-91-6 phenylthiomethyl chloride 
• 444122-24-1 rac-1,2-dimethyl-1,2,2-triphenyl-1-(N-piperidinomethyl)disilane 
• 15501-33-4 neopentyl iodide 
• 753-89-9 neopentyl chloride 
• 630-17-1 2,2-dimethylpropyl bromide 
• 18243-41-9 (bromomethyl)trimethylsilane 
• 4206-67-1 iodo(trimethylsilyl)methane 

Downstream Products

• 49777-84-6 Tris(methyldiphenylsilylmethyl)amin 
• 154921-99-0 C₁₆H₁₆F₆O₆S₂Si₂ 
• 121004-58-8 tert-butoxy(methyl)diphenylsilane 
• 69634-43-1 C₁₃H₁₃Si^(1-)*K⁽¹⁺⁾ 
• 17571-61-8 Bromo-methyl-diphenyl-silane 
• 807-28-3 1,3-Dimethyl-1,1,3,3-tetraphenyldisiloxan 
• 18666-54-1 (methyldiphenylsilyl)(phenyl)methanone 
• 134134-79-5 1-Chloro-1,2-dimethyl-1,2,2-triphenyl-disilane 
• 4518-98-3 1,1,2,2-tetrachloro-1,2-dimethyldisilane 
• 776-76-1 methyldiphenylsilane 
• 122131-74-2 cyclohexanecarboxyl diphenyl methyl silane 
• 121667-15-0 1-morpholine 

Relevant academic research and scientific papers

Access to Stabilized Silyl Anions by Electroreduction of Chlorosilanes

Using the sacrificial anode technique, the electroreduction of arylchlorosilanes into the corresponding arylhydrosilanes occurs via a silylaluminium intermediate characterized for the first time in such reactions.

Raman and infrared vibrational spectra, ab initio calculations and normal coordinate analyses for 1,2-dimethyltetrachlorodisilane and 1,2-dimethyltetrachlorodisilane-d6

The Raman spectra of CH3Cl2SiSiCl2CH3 and CD3Cl2SiSiCl2CD3 between 3000 and 30 cm-1 have been recorded at various temperatures. The infrared spectra at ambient temperature were recorded from 3000 to 50 cm-1. Both isotopomers exist as a mixture of gauche and anti rotamers at room temperature. The energy difference E(anti)-E(gauche) was determined from the Raman spectra as being -0.9 ± 0.2 kJ mol-1 for CH3Cl2SiSiCl2CH3 and -1.2 ± 0.2 kJ mol-1 for CD3Cl2SiSi2CD3. Assisted by ab initio calculations, the vibrational spectra have been assigned using C(2h) symmetry for the anti rotamers and C2 symmetry for the gauche rotamers. Scaled and unscaled harmonic frequencies and harmonic symmetry force constants have been reported for both rotamers, and normal coordinate analyses have been carried out. Potential energy distributions have been reported.

A Quantitative NMR Method for Silyllithium Analysis

A rapid and extremely simple method for silyl anion analysis is presented. The progress of silyllithium reagent preparation can be determined by quenching an aliquot with neat chloro(trimethyl)silane, evaporation, dilution with CDCl 3, and direct proton NMR analysis. This procedure is fast, simple, and allows for identification and relative quantification of the starting reagent, intermediates, and the silyllithium product.

Disilane and preparation method thereof

The invention discloses disilane and a preparation method thereof. The preparation method of disilane includes: subjecting a uniformly mixed reaction system containing tertiary hydrosilane and a catalyst to dehydrogenation reaction at a temperature ranging from -10DEG C to 120DEG C to obtain disilane, wherein the catalyst comprises a silver salt. The invention also discloses the disilane preparedby the method. The method for preparation of the disilane by catalyzing tertiary silane dehydrogenation with the silver salt adopts the silver salt to activate the Si-H bond in the silane so as to realize construction of disilane. Therefore, the invention provides an efficient and simple method for preparation of the compound, and the application prospect is wide.

METHOD FOR PRODUCING SILYL SODIUM COMPOUND AND METHOD FOR DEOXIDIZING EPOXY COMPOUND

PROBLEM TO BE SOLVED: To construct a technique which can simply, efficiently and inexpensively synthesize a silyl sodium compound in a small number of processes and in a short time, especially to construct a technique which synthesizes a silyl sodium compound by using easily available reagents from a viewpoint of sustainability without using reagents which are difficult to handle and are toxic. SOLUTION: There is provided a method for synthesizing a silyl sodium compound comprising a step of reacting a dispersion obtained by dispersing a silyl halide compound or a disilane compound with sodium into a dispersion solvent, the silyl halide compound or the disilane compound as a starting compound, in a reaction solvent to obtain the silyl sodium compound. There is also provided a method for deoxidizing an epoxy compound comprising a step of reacting the silyl sodium compound obtained by synthesizing method of the silyl sodium compound with an epoxy compound to deoxidize the epoxy compound to stereoselectively produce an alkene compound. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2020,JPOandINPIT

Method for continuously preparing disilane compounds by micro-reaction device

The invention discloses a method for continuously preparing disilane compounds by a micro-reaction device. The method comprises the following steps: (1) a solution A is prepared from organosilane by dissolving in a first organic solvent, or is organosilane; (2) a solution B is prepared from an oxidant by dissolving in a second organic solvent, or is an oxidant; (3) the solution A and the solutionB are pumped into a micro-mixer of the micro-reaction device simultaneously for mixing, a product then flows into a microreactor of the micro-reaction device for reaction, and the disilane compounds are prepared, wherein the microreactor is filled with a catalyst. Raw materials required in the method are easily available and have better stability, metal copper compounds are used as a catalyst forcoupling reaction on trisubstituted silanes, and the coupling effect on trisubstituted silanes is better than that of alkali metal catalysts and transition metal catalysts; a micro-channel reactor issuitable for an exothermic coupling reaction due to good mixing and heat transfer performance.

Pinacol couplings of a series of aldehydes and ketones with SmI2/Sm/Me3SiCl in DME

The pinacol coupling is one of the most significant methods to synthesize vic-diols. The combination of samarium diiodide (SmI2) and samarium metal successfully induces the selective pinacol couplings of not only aromatic aldehydes and ketones but also aliphatic ones in the presence of trimethylchlorosilane (Me3SiCl) in 1,2-dimethoxyethane (DME). DME is the most suitable solvent for the reduction system using SmI2 and Me3SiCl. Me3SiCl, a widely available additive, prevents the decomposition of the formed vic-diols, i.e., meso-isomers, and controls their stereochemistry. In particular, the pinacol couplings of sterically hindered aliphatic aldehydes and ketones proceed with excellent diastereoselectivities to afford dl-isomers in good yields.

Efficient fluoride-catalyzed conversion of CO2 to CO at room temperature

A protocol for the efficient and selective reduction of carbon dioxide to carbon monoxide has been developed. Remarkably, this oxygen abstraction step can be performed with only the presence of catalytic cesium fluoride and a stoichiometric amount of a disilane in DMSO at room temperature. Rapid reduction of CO2 to CO could be achieved in only 2 h, which was observed by pressure measurements. To quantify the amount of CO produced, the reduction was coupled to an aminocarbonylation reaction using the two-chamber system, COware. The reduction was not limited to a specific disilane, since (Ph 2MeSi)2 as well as (PhMe2Si)2 and (Me3Si)3SiH exhibited similar reactivity. Moreover, at a slightly elevated temperature, other fluoride salts were able to efficiently catalyze the CO2 to CO reduction. Employing a nonhygroscopic fluoride source, KHF2, omitted the need for an inert atmosphere. Substituting the disilane with silylborane, (pinacolato)BSiMe2Ph, maintained the high activity of the system, whereas the structurally related bis(pinacolato)diboron could not be activated with this fluoride methodology. Furthermore, this chemistry could be adapted to 13C-isotope labeling of six pharmaceutically relevant compounds starting from Ba13CO 3 in a newly developed three-chamber system.

Reactions of molybdenum hydrides with organochlorosilanes: Silicon-silicon bond formation under mild conditions

Reactions of molybdenum hydrides containing polydentate phosphinoalkylsilyl ligands with a number of chlorosilanes have been investigated; this has led to the discovery of a novel type of a dechlorinative Si-Si coupling reaction.

Photoinduced reductive coupling of organochlorosilanes with SmI2/Sm

We report efficient reductive dimerization of chlorosilanes with SmI2/Sm in 1,2-dimethoxyethane upon visible light irradiation. This procedure can be applied to the synthesis of polysilanes from dichlorosilanes. The molecular weight of the obtained polysilanes was higher and their molecular weight distribution was narrower than the polysilanes produced by reactions with SmI2/Sm in dark.