25476-71-5

Basic information

• Product Name: Ethane, 1,1-dichloro-1,2,2-trifluoro-2-(trifluoromethoxy)-
• CAS NO: 25476-71-5
• Molecular Formula: C3Cl2F6O
• Molecular Weight: 236.929
• Mol File: 25476-71-5.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Ethane, 1,1-dichloro-1,2,2-trifluoro-2-(trifluoromethoxy)-(CAS DataBase Reference)
• NIST Chemistry Reference: Ethane, 1,1-dichloro-1,2,2-trifluoro-2-(trifluoromethoxy)-(25476-71-5)
• EPA Substance Registry System: Ethane, 1,1-dichloro-1,2,2-trifluoro-2-(trifluoromethoxy)-(25476-71-5)

Safety Data

• Hazardous Substances Data: 25476-71-5(Hazardous Substances Data)

Upstream product

• 79-35-6 1,1'-dichloro-2,2'-difluoroethene 
• 373-91-1 hypofluorous acid trifluoromethyl ester 
• 136649-69-9 1,1,2,2-tetrachloro-1-fluoro-2-trifluoromethoxyethane 
• 94720-90-8 1-fluoro-2-trifluoromethyl-1,1,2-trichloroethane 

Relevant articles and documents

THE INFRARED SPECTRA OF GASEOUS 1,1,3,3-TETRACHLOROTETRAFLUORO-4-(TRIFLUOROMETHYLDIOXY)BUTYL TRIFLUOROMETHYL ETHER AND 1,1,3,3-TETRACHLOROTETRAFLUORO-1,4-BIS(TRIFLUOROMETHOXY)BUTANE

1,1,3,3-Tetrachlorotetrafluoro-4-(trifluoromethyldioxy)butyl trifluoromethyl ether, CF3O(CF2CCl2)2O2CF3, was formed as one of the products in the reaction of CF3O3CF3 with CF2CCl2 at 322.6 - 342.5 K.It was isolated by fractional condensation between 213 and 243 K and characterized by molecular weight determination and 19F NMR spectrum. 1,1,3,3-Tetrachlorotetrafluoro-1,4-bis(trifluoromethoxy)butane, CF3O(CF2CCl2)2OCF3, was condensed as residue at 193 K from the reaction of CF3OF with CF2CCl2 at 266 - 302.7 K, when / 0.5.It was characterized by gas chromatography and molecular weight determination.The infrared spectra of both compounds are given, providing additional support for their characterization.

Kinetics and Mechanism of the Thermal Reaction between Trifluoromethylhypofluorite and 1,1-Dichlorodifluoroethylene

The thermal addition of CF3OF to CF2CCl2 has been studied between -7.0 and 29.7 deg C.The pressure of CF3OF was varied between 6.4 and 196.7 Torr and that of CF2CCl2 between 5.4 and 203 Torr.CF3CCl2F, CF3O(CF2CCl2)F and CF3O(CF2CCl2)iOCF3, where i = 2,3. . .n, were the products.Above 110 Torr of olefin, non-volatile condensate appeared.The reaction was homogeneous and not affected by the total pressure or the presence of an inert gas.Introducing a few Torr of O2 to the reaction system an instantaneous oxidation of CF2CCl2 to CF2ClC(O)Cl occurred.Higher amounts of O2 led to explosion with conversion of both reactant molecules.The basic steps of the reaction were: generation of radicals CF3O. and CF3CCl2. in the bimolecular process between CF3OF and CF2CCl2 (rate constant k1), generation of telomeric radicals by addition of CF3O. to CF2CCl2, abstraction of fluorine atoms from CF3OF by CF3CCl2. and by CF3O(CF2CCl2). (rate constant k4), chain propagation by further successive addition of telomeric radicals to another molecule of olefin (k5) and recombination of telomeric radicals.The following values of the rate constants were obtained: k1 = (5.0+/-1.0)106exp(-9.7+/-0.9 kcal*mol-1/RT)l*mol-1s-1, k4 = (2.6+/-0.5)107exp(-3.1+/-0.6 kcal*mol-1/RT)l*mol-1s-1, k5 = (1.7+/-0.4)105exp(-2.5+/-0.5 kcal*mol-1/RT)l*mol-1s-1. - Keywords: CF3OF, thermal reaction with CCl2CF2 / CCl2CF2, thermal reaction with CF3OF / Trifluoromethylhypofluorite, addition to 1,1-dichlorodifluoroethylene / 1,1-Dichlorodifluoroethylene, reaction with trifluoromethylhypofluorite