18165-20-3

Upstream product

• 1558-33-4 chloromethylmethyldichlorosilane 

Downstream Products

• 20156-51-8 methyl(chloromethyl)hydrochlorosilane 
• 6787-86-6 1,3-disilabutane 

Relevant academic research and scientific papers

Conformational stability, vibrational spectra and ab initio calculations for chloromethyl methyl silane and chloromethyl methyl difluorosilane

The infrared spectra of gaseous and solid chloromethyl methyl silane, CICH2SiH2CH3, and chloromethyl methyl difluorosilane, CICH2SiF2CH3, were recorded. Additionally, the variable temperature infrared spectra of the sample dissolved in liquid krypton and/or xenon were obtained. Both the trans and gauche conformers are present in the fluid phases but only the trans conformer is present in the solid for both molecules. The enthalpy difference between the two conformers for chloromethyl methyl silane was determined to be 180 ± 15 cm-1 (2.16 ± 0.18 kJ./mol) and for chloromethyl methyl difluorosilane 236 ± 15 cm-1 (2.82 ± 0.17 kJ/mol) in xenon with the gauche conformers more stable for both molecules. The enthalpy value for the silane in krypton is 181 ± 18 cm-1 (2.16 ± 0.09 kJ/mol). Ab initio calculations were carried out at the RHF/6-31G* and MP2/6-31G* levels for both molecules from which structural parameters and conformational stabilities were determined.

Raman and infrared spectra, conformational stability, ab initio calculations and vibrational assignments for chloromethyl methyl silane

The infrared (3500 to 30 cm-1) spectra of gaseous and solid and the Raman (3500 to 10 cm-1) spectra of the liquid with quantitative depolarization ratios and solid chloromethyl methyl silane, ClCH2SiH2CH3, have been recorded. Similar data have also been recorded for the Si-d2 isotopomer. These data indicate that two conformers are present in the fluid states but only one conformer is present in the annealed crystalline state. The mid-infrared spectra of the sample dissolved in liquified xenon as a function of temperature (- 100 to - 70°C) have been recorded. Utilizing conformer pairs at 738 (gauche), 685 (gauche), and 700 (trans) cm-1 the enthalpy difference has been determined to be 180 ± 18 cm-1 (515 ± 51 cal mol-1) with the gauche conformer the more stable species. However, in the spectrum of the solid, the trans conformer is the stable retainer remaining after the sample is well annealed. Utilizing the Si-H stretching frequencies from the infrared spectrum of the ClCH2SiHDCH3 isotopomer, the two Si-H bond distances are calculated to be 1.482 and 1.487 A for the gauche conformer. The optimized geometries, conformational stabilities, harmonic force fields, infrared intensities, Raman activities, depolarization ratios, and vibrational frequencies are reported for both conformers from RHF/6-31G* and/or MP2/6-31G* ab initio calculations. The gauche conformer is predicted to be the more stable retainer from both ab initio calculations in agreement with the experimental results. The other calculated quantities are compared to the experimentally determined values where applicable as well as with some corresponding results for some similar molecules.

Facile preparation of hydrochlorosilane by alkali metal halide catalyzed Si-H/Si-Cl redistribution reaction

Various alkali metal halides were found to catalyze the Si-H/Si-Cl redistribution reaction in different polar solvents efficiently. The scope of silane substrate was studied using KF as catalyst and 18-crown-6 as cocatalyst in DMI. The alkali metal halides catalyzed redistribution system provides a useful method to prepare hydrochlorosilanes more facilely. A possible mechanism was proposed to explain the process.

METHOD FOR PRODUCING -HETERO-SUBSTITUTED ALKYLHALOHYDROSILANE AND USE THEREOF

Method for efficiently producing α-hetero-substituted alkylhalohydrosilane,and use thereof. A method for producing (A) a halohydrosilane compound represented by the general formula (1): H-SiR2c(CR13-bYb)aX3-a-c (1) (wherein, R1 represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group; R2 represents a substituted or unsubstituted hydrocarbon group; X represents a halogen atom; Y represents a hetero substituent; a is 1 or 2; b is any one of 1, 2 and 3; c is 1 or 0), by allowing (B) a halosilane compound represented by the general formula (2) : SiR2c(CR13-bYb)aX4-a-c (2) (wherein, R1, R2, X, Y, a, b and c are as defined above) to react with (C) a hydrosilane compound. A method for producing a reactive silicon group-containing polymer using the halohydrosilane compound (A).

Pentacoordinate hydrochlorosilanes with lactamomethyl ligand

The synthesis and reaction behavior of pentacoordinate hydrochlorosilanes LCH2SiRHCl (L- 2-piperidonyl ligand, R = Me, Ph, Bn) are described. The intramolecular O-Si and N-Si coordination is discussed on the basis of the NMR data. The strength

Synthetic Pathways to Simple Di- and Trisilylmethanes: Potential Starting Materials for the CVD Deposition of Amorphous Silicon a-SiC:H

Methods for the preparation of simple silaalkanes with a high content of silicon and hydrogen have been explored.Target molecules, like H3SiCH2SiH3 and HC(SiH3)3, may serve as precursor molecules for the production of photovoltaic elements through thermal or discharge (plasma) CVD processes.Among a variety of synthetic pathways, the reactions between HSiCl3 and HCCl3 in the presence of an amine (Benkeser reaction) and the direct synthesis from silicon and polychloromethanes proved most promising for large scale preparations.The CH2X2/KSiH3 metathesis is most useful on the laboratory scale. - The Grignard synthesis was employed for partly methylated homologues, like H3SiCH2SiH2CH3, H3SiCH2SiH(CH3)2, H3SiCH2Si(CH3)3, and related molecules.The magnesium reduction of CHBr3/SiCl4 and CHBr3/CH3SiCl3 mixtures serves best for the preparation of HC(SiCl3)3, which can be converted into HC(SiH3)3 using LiAlH4.Attempts to synthesize tetrasilylmethane via the same route, C(SiH3)4, led only to the formation of HC(SiH3)3. - Key words: Amorphous Silicon a-SiC:H, Disilylmethane, Trisilylmethane, Direct Synthesis, Polysilylmethanes