Journal of the American Chemical Society, Vol.123, No.28, 6767-6772, 2001
Pyrolyses of chlorodifluoromethane and trifluoromethane in the presence of hydrogen. Mechanism and optimization of reaction conditions
When CHClF2 and CHF3 are subjected to high-temperature, gas-phase flow pyrolysis in the presence of H-2, they are converted, via a free radical chain mechanism, to CH2F2, CHF2CHF2, and CF3CH2F in good yield. Optimal conditions for pyrolysis of CHClF2 involve a high conversion (92%) at 650 degreesC with an observed yield of products = 18, 17, and 28%, respectively, whereas optimal conditions for CHF3 involve a low conversion (24%) at 775 degreesC, but a higher yield of products (26, 6, and 39%, respectively).