Dichlorofluoromethane, reaction

Condensatron between lithium acetylides and dibromodifluoromethane [124] or dichlorofluoromethane [125] leads to fluorohaloacetylenes (equation 107) Sodium alkyl malonates are also alkylated by dihalogenodifluoromethanes [124] (equation 108) These reactions involve difluorocarbene as intermediate (for the mechanism of the Cp2Br2 condensation, see equation 15)... 

Most of the investigations into disproportionation reactions have mainly concentrated on chlorofiuoro derivatives of methane and ethane. When trichlorofluoromethane is refluxed with aluminum trichloride or aluminum tribromide, dichlorodifluoromethane and carbon tetrachloride are obtained. Dichlorofluoromethane yields chlorodifiuoromethane and chloroform chlorofiuoro derivatives of ethane and longer chain homologs exhibit a tendency towards isomerization as well as disproportionation, i.e. intramolecular halogen atom exchange. In this case, both types of reaction take place simultaneously. In other words, disproportionation of l,l,2-triehloro-1.2,2-trifiuoroethane (1) forms l,l,1.2-tetrachloro-2,2-difluoroethane (2) and... 

Peng, J., Wan., A. (1998) Effect of ionic strength on Henry s constants of volatile organic compounds. Chemosphere 36,2731-2740. Perry, R.A., Atkinson, R., Pitts Jr., J.N. (1976) Rate constants for the reaction of hydroxyl radicals with dichlorofluoromethane, and chloromethane over temperature range 298—423 K and with dichloromethane at 298 K. J. Chem. Phys. 64, 1618-1620. Perry, R.A., Atkinson, R., Pitts Jr., J.N. (1977) Rate constants for the reaction of OH radicals with CH2=CHF, CH2=CHC1, and CH2=CHBr over temperature range 299-426 K. J. Chem. Phys. 67, 458 162. 

The reaction of dichlorofluoromethane with oxirane, catalytic amounts of a quaternary ammonium bromide, and an alkene (150°C, autoclave) produced 1-chloro-l-fluorocyclo-propanes (see Houben-Weyl, Vol. 4/3, pp 377, 380 and Vol. El9b, p 1488). 

Chang JS, Kaufman F. 1977. Kinetics ofthe reactions of hydroxyl radicals with some halocarbons Dichlorofluoromethane, chlorodifluoromethane, trichloroethane, trichloroethylene, and tetrachloroethylene. J Chem Phys 66 4989-4994. 

DICHLOROFLUOROMETHANE (75-43-4) Contact with water causes slow decomposition. Reacts, possibly violently, with barium, sodium, and potassium. Violent reaction with molten aluminum, magnesium. Reacts with acids or acid fumes, producing highly toxic chlorine and fluorine fumes. Attacks chemically active metals alkaline earth, aluminum, copper. 

Let s use dichlorofluoromethane (CF Cl sold under the brand-name Freon-12) to illustrate the sequence of ozone-desffoying reactions ... 

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