Mass Spectrometric Studies of Low Pressure Pyrolysis Reactions of Chlorinated and Fluorinated C 1 and C 2 Compounds on Graphite 1
The pyrolysis behavior of chlorinated derivatives of methane, ethane, and ethylene was investigated in graphite ovens at pressures between 10/sup -2/ and one mm of Hg in the temperature range 450 - 1300 deg K. Several C/sub 2/ compounds studied transfer chlorine atoms from adjacent carbon atoms to the graphite surface. The pressure dependence of the yield of dechlorinated products indicated a firstorder relationship between product and reactant. This is interpreted as evidence for the existence of an equilibrium reaction with graphite. Heats of reaction for the removal of two chlorine atoms from adjacent carbon atoms are found to vary between +12 and +25 kcal. The compound sym- tetracldoroethane pyrolyses to both sym-dichloroethylene and trichlorethylene, the latter by the elimination of HCl(g). The HCl elimination reactions are found to follow a more complex pressure dependence than those observed for dechlorination. Several fluoro-chloro C/sub 1/ and C/sub 2/ compounds also were dehalogenated over graphite. (auth)
- Research Organization:
- Cornell Univ., Ithaca, N.Y.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-032146
- OSTI ID:
- 4835524
- Journal Information:
- Journal of the American Chemical Society, Vol. 83, Issue 18; Other Information: Orig. Receipt Date: 31-DEC-61; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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