Radical anion of 1,1-difluoroethylene. EPR evidence for a perpendicular geometry. [Gamma rays]
EPR spectra of the tetrafluoroethylene and 1-difluoroethylene radical anions were obtained. The EPR spectrum of CF/sub 2/ = CH/sub 2//sup -/ is interpreted in terms of a 90/sup 0/ twisted (perpendicular) molecular geometry with the unpaired electron occupying an orbital which can be designated as sigma* (or ..pi..'*) for the CF/sub 2/ group and ..pi.. for the CH/sub 2/ group. EPR spectra recorded from a ..gamma..-irradiated solution of CF/sub 2/ = CH/sub 2/ in methylcyclohexane-d/sub 14/ (MCHD) glass and 2-methyltetrahydrofuran glasses provided qualitative evidence for the formation of the 1,1-difluoroethylene radical anion, but lack of spectral resolution provided few clues about its structure. EPR studies in partially ordered, crystalline MCHD solutions showed a well-defined hyperfine structure. (BLM)
- Research Organization:
- Univ. of Tennessee, Knoxville
- OSTI ID:
- 6260808
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 103:10; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-energy transformations of polyfluoroalkanes. IX pyrolysis of 1,1-difluoroethane
EPR study of a radical anion in x-ray irradiated trifluoroacetamide single crystals at 3 K
Related Subjects
400600* -- Radiation Chemistry
ANIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
FLUORINATED ALIPHATIC HYDROCARBONS
GAMMA RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
IONIZING RADIATIONS
IONS
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOLYSIS
RESONANCE