865-46-3

Basic information

• Product Name: DIMETHYLFLUOROSILANE
• Synonyms: DIMETHYLFLUOROSILANE
• CAS NO: 865-46-3
• Molecular Formula: C₂H₇FSi
• Molecular Weight: 78.16
• Mol File: 865-46-3.mol
• Article Data: 4

Chemical Properties

• Melting Point: -115°C
• Boiling Point: -9°C
• Appearance: /
• Vapor Pressure: 1530mmHg at 25°C
• CAS DataBase Reference: DIMETHYLFLUOROSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: DIMETHYLFLUOROSILANE(865-46-3)
• EPA Substance Registry System: DIMETHYLFLUOROSILANE(865-46-3)

Safety Data

• Statements: 11-34
• Safety Statements: 16-26-36/37/39
• RIDADR: 3309
• TSCA: No
• Hazardous Substances Data: 865-46-3(Hazardous Substances Data)

Usage

General Description

Dimethylfluorosilane is a chemical compound with the formula (CH3)2SiF2. It is a colorless, flammable liquid with a pungent odor. Dimethylfluorosilane is used in the production of silicones, which have a wide range of industrial applications including adhesives, sealants, and coatings. It is also used as a reagent in organic synthesis, especially in the production of fluorinated organic compounds. Dimethylfluorosilane is highly reactive and must be handled with care due to its flammability and toxicity. It should be stored in a cool, dry place away from heat, sparks, or open flames.

InChI:InChI=1/C2H7FSi/c1-4(2)3/h4H,1-2H3

Upstream product

• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 
• 328-57-4 methyldifluorophenylsilane 
• 368-47-8 phenyltrifluorosilane 
• 10112-10-4 (difluoromethyl)silane 
• 1066-35-9 dimethylmonochlorosilane 

Downstream Products

• 1639345-42-8 3-cyanopropyldimethylfluorosilane 
• 3429-62-7 trimethylhexylsilane 

Relevant articles and documents

Electrochemical synthesis of symmetrical difunctional disilanes as precursors for organofunctional silanes

Difunctional disilanes of the general type XR2SiSiR2X (1-5) (X = OMe, H; R = Me, Ph, H) have been synthesized by electrolysis of the appropriate chlorosilanes XR2SiCl in an undivided cell with a constant current supply and in the absence of any complexing agent. Reduction potentials of the chlorosilane starting materials derived from cyclic voltammetry measurements were used to rationalize the results of preparative electrolyses. Organofunctional silanes of the general formula MeO(Me 2)SiC6H4Y (6a-c, 7) were subsequently obtained by the reaction of sym-dimethoxytetramethyldisilane (1) with NaOMe in the presence of p-functional aryl bromides BrC6H4Y (Y = OMe, NEt2, NH2).

Cleavage of siloxanes with organyltrifluoro- and diorganyldifluorosilanes

Hexamethyldisiloxane is cleaved with organyltrifluoro- or diorganyldifluorosilanes as low as 20 deg C in the absence of catalysts to from earlier unknown 1,1,1-trimethyl, 3-organyl-3,3-difluoro- or 1,1,1-trimethyl-, 3,3-diorganyl-3-difluorodisiloxanes with the general formula R4-nSiFn-1OSi(CH3)3 (n = 2-3) in 57-97percent yield.The Si-O bond in 1,1,3,3-tetramethyldisiloxane is broken with organyltrifluoro- or diorganyldifluorosilanes in a similar manner but more slowly to give 1,1-dimethyl-, 3-organyl-, 3,3-difluoro- or 1,1-dimethyl, 3,3-diorganyl-, 3-fluorodisiloxanes with the general formula R4-nSiFn-1OSiH(CH3)2 (n = 2-3) in 50-70percent yield.The reaction of phenyltrifluorosilane with 1,1,1,3,3,5,5,5-octamethyltrifluorosiloxane leads to 1,1,1,3,3-pentamethyl-, 5,5-difluoro-, 5-phenyltrisiloxane, whereas the reaction with tetrakis (trimethylsiloxy)siloxane gives tri(trimethylsiloxy)difluoro(phenyl)silane.Even under normal conditions of storage, the cleavage products disproportionate readily in different directions.The ability of these compounds to disproportionation depends on the nature of the substituents attached to the silicon atom and the number of fluorine atoms in the molecule.