Isotopically selective CO/sub 2/ transverse excitation laser induced chemical reactions of Cl/sub 2/CF/sub 2/ and Br/sub 2/CF/sub 2/ with olefins
Journal Article
·
· J. Am. Chem. Soc.; (United States)
The CO/sub 2/ transverse excitation laser induced chemical reactions of Cl/sub 2/CF/sub 2/ and Br/sub 2/CF/sub 2/ with isobutylene, propylene, and ethylene have been investigated. In the (H/sub 3/C)/sub 2/C == CH/sub 2//Br/sub 2/CF/sub 2/ system, evidenced for the initial presence of laser-produced difluorocarbene was provided by the isolation of the CF/sub 2/--olefin addition compound 1,1-difluoro-2,2-dimethylcyclopropane in the product array. The yield of this product from the (H/sub 3/C)/sub 2/C == CH/sub 2//Cl/sub 2/CF/sub 2/ system was dependent upon the laser irradiation frequency. No analogous gem-difluorocyclopropanes were detected in the Br/sub 2/CF/sub 2//H/sub 3/CCH == CH/sub 2/ and Br/sub 2/CF/sub 2//C/sub 2/H/sub 4/ systems. Carbon isotopic segregation was noted in all experiments. The complex nature of these reaction systems is examined in some detail. The concept of utilizing a laser-produced, isotopically specific reactive intermediate such as :CF/sub 2/ for the direct synthesis of labelled compounds is presented. 1 figure, 3 tables, 24 references.
- Research Organization:
- National Bureau of Standards, Washington, DC
- OSTI ID:
- 6820018
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 100:8; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
2-METHYLPROPENE
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKENES
BROMINATED ALIPHATIC HYDROCARBONS
CARBON ISOTOPES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
ELECTROMAGNETIC RADIATION
ETHYLENE
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFRARED SPECTRA
ISOTOPE SEPARATION
LABELLED COMPOUNDS
LASER RADIATION
MAGNETIC RESONANCE
MASS SPECTRA
NUCLEAR MAGNETIC RESONANCE
ORGANIC BROMINE COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PROPYLENE
RADIATIONS
RESONANCE
SEPARATION PROCESSES
SPECTRA
SYNTHESIS
YIELDS
10 SYNTHETIC FUELS
2-METHYLPROPENE
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKENES
BROMINATED ALIPHATIC HYDROCARBONS
CARBON ISOTOPES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
ELECTROMAGNETIC RADIATION
ETHYLENE
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFRARED SPECTRA
ISOTOPE SEPARATION
LABELLED COMPOUNDS
LASER RADIATION
MAGNETIC RESONANCE
MASS SPECTRA
NUCLEAR MAGNETIC RESONANCE
ORGANIC BROMINE COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PROPYLENE
RADIATIONS
RESONANCE
SEPARATION PROCESSES
SPECTRA
SYNTHESIS
YIELDS