373-74-0

Basic information

• Product Name: METHYLTRIFLUOROSILANE
• Synonyms: CH3SiF3;SiCH3F3;Silicon carbide fluoride hydride (sicf3H3);trifluoromethyl-silan;TRIFLUORO(METHYL)SILANE;METHYLTRIFLUOROSILANE;Methyltrifluorosilane 98%;Methyltrifluorosilane98%
• CAS NO: 373-74-0
• Molecular Formula: CH₃F₃Si
• Molecular Weight: 100.12
• EINECS: 206-770-6
• Mol File: 373-74-0.mol
• Article Data: 12

Chemical Properties

• Melting Point: -73 °C
• Boiling Point: -30 °C
• Appearance: /
• Density: 1.03 g/cm³
• Vapor Pressure: 3810mmHg at 25°C
• CAS DataBase Reference: METHYLTRIFLUOROSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: METHYLTRIFLUOROSILANE(373-74-0)
• EPA Substance Registry System: METHYLTRIFLUOROSILANE(373-74-0)

Safety Data

• Hazard Codes: F
• Statements: 12-34
• Safety Statements: 16-26-36/37/39-45
• RIDADR: 3309
• TSCA: Yes
• Hazardous Substances Data: 373-74-0(Hazardous Substances Data)

Usage

General Description

Methyltrifluorosilane, with the chemical formula CH3SiF3, is a colorless, flammable gas with a pungent odor. It is used as a precursor in the production of silicon-containing materials and as a reagent in organic synthesis. Methyltrifluorosilane is a highly reactive compound and can react vigorously with water, air, and oxidizing agents, posing a fire and explosion risk. It is important to handle this chemical with care and in a well-ventilated area to avoid potential health and safety hazards. Additionally, it is crucial to follow proper storage and disposal procedures to prevent environmental contamination.

InChI:InChI=1/CH3F3Si/c2-1(3,4)5/h5H3

Upstream product

• 4617-27-0 1,3-dimethyl-1,1,3,3-tetrachlorodisiloxane 
• 17928-28-8 methyltrimethicone 
• 420-56-4 trimethylsilyl fluoride 
• 1185-55-3 Methyltrimethoxysilan 
• 271772-12-4 methylfluorodimethoxysilane 
• 271772-13-5 methyldifluoromethoxysilane 
• 75-79-6 Methyltrichlorosilane 
• 7647-18-9 antimonypentachloride 
• 7783-56-4 antimony(III) fluoride 
• 126087-12-5 trimethyl(trifluorsilyl)stannane 
• 74-83-9 methyl bromide 
• 2031-67-6 Methyltriethoxysilan 
• 375-72-4 Nonafluorobutanesulfonyl fluoride 
• 121-44-8 triethylamine 

Downstream Products

• 75-46-7 trifluoromethan 
• 335-06-8 trifluoromethyltrimethylsilane 
• 55632-07-0 (1,1-Difluoroethyl)trifluorsilin 
• 54389-21-8 (2,2,2-Trifluor-ethyl)-trifluorsilan 
• 100-42-5 styrene 
• 420-56-4 trimethylsilyl fluoride 
• 1185-55-3 Methyltrimethoxysilan 
• 271772-12-4 methylfluorodimethoxysilane 
• 271772-13-5 methyldifluoromethoxysilane 
• 353-66-2 dimethyldifluorosilane 
• 52686-74-5 methoxydimethylfluorosilane 
• 107-46-0 Hexamethyldisiloxane 
• 13478-20-1 trifluorophosphoric acid 
• 1039553-18-8 C₁₅H₁₆F₂OSi 

Relevant articles and documents

(p-d) ? Bonding in Fluorosilanes? Gas-Phase Structures of (CH3)4-nSiFn with n = 1-3 and of t-Bu2SiF2

The gas-phase structures (rg values) of the methylfluorosilanes (CH3)4-nSiFn with n = 1-3 and of di-tert-butyl-difluorosilane, t-Bu2SiF2, have been determined by electron diffraction.In the case of CH3SiF3 the microwave rotational constant was included in the structure analysis.In the methylfluorosilane series a steady decrease of Si-F and Si-C bond lengths is observed with increasing fluorination: Si-F = 1.600(2), 1.586(2), and 1.570(2) Angstroem and Si-C = 1.848(2), 1.836(2), and 1.828(4) Angstroem for (CH3)3SiF, (CH3)2SiF2, and CH3SiF3, respectively.These trends are rationalized by increasing polar contributions and contraction of the silicon valence shell.Ab initio calculations for SiF4 indicate that (p-d) ? bonding is negligible.Substitution of the methyl groups in (CH3)2SiF2 by tert-butyl groups leads to lengthening of Si-F and Si-C bonds and strong variations in the silicon bond angles: Si-F = 1.586(2), 1.606(4) Angstroem; Si-C = 1.836(2), 1.869(3) Angstroem; CSiC = 116.7(6) deg, 125.5(11) deg; and FSiF = 104.6(4) deg, 97.7(8) deg in (CH3)2SiF2 and t-Bu2SiF2, respectively.

Conversion of Poly(methylhydrosiloxane) Waste to Useful Commodities

Poly(methylhydrosiloxane) [PMHS, R(OSiMeH)nOR] is applied in chemistry as cheap, low-toxic, air and moisture stable reducing reagent. However, along with the desired products significant amounts of silicone waste is produced, since only ~1.7 % of the PMHS is employed for the reduction process. The formation of PMHS-waste reduces the sustainability of such reduction protocols. For instance PMHS can be applied as reagent (a) in the methanolysis to produce molecular hydrogen; (b) in the reduction of sulfoxides to form the corresponding sulfides; (c) in the hydrodeoxygenation of fatty esters to produce hydrocarbons. An option for the treatment of the PMHS-waste can be the application of depolymerization methods to convert it to useful commodities. In more detail, the silicone waste is reacted in a depolymerization reaction with boron trifluoride diethyl etherate (BF3OEt2) to produce methyltrifluorosilane (MeSiF3) and difluoromethylsilane (MeSiF2H), which can be interesting building blocks for the silicone industry, overall demonstrating a resource conserving process.

Synthesis of alkyl fluorosilanes by the reaction of alkyl chlorosilanes with pyridinium poly(hydrogen fluoride) at room temperature

Dimethyl difluorosilane (DFS) has been prepared in high yield (80-90percent) by the reaction of dimethyl dichloro-silane with pyridinium poly(hydrogen fluoride) at room temperature (25-35 deg C).The gas has been characterised by IR and 19F NMR spectroscopy, molecular weight measurements and elemental analysis.The method has been extended to the preparation in high yields of monomethyl and trimethyl fluorosilanes.

REACTIONS OF SODIUM HYDROGENDIFLUORIDE WITH CYCLIC, LINEAR, AND BRANCHED METHYLTETRASILOXANES

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