EPR study of a radical anion in x-ray irradiated trifluoroacetamide single crystals at 3 K

Journal Article · Tue Mar 01 00:00:00 EST 1983 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.445075· OSTI ID:6532527

Samskog, P; Kispert, L D

The radical anion CF/sub 3/CONH/sub 2//sup -/ was identified by EPR spectroscopy in a single crystal of trifluoroacetamide x-ray irradiated at 3 K. The primary radical gave anisotropic hyperfine couplings to a fluorine of 139, 78, and 63 G, with g values 2.0061, 2.0047, and 2.0029. The maximum fluorine coupling is directed close to one of the C--F bonds, indicating a delocalization of spin density into that bond. The radical anion decomposes thermally by defluorination, giving CF/sub 2/CONH/sub 2/. By bleaching the anion with visible light a CF/sub 3/ fragment is formed. A complete reaction mechanism both for the primary oxidation and reduction products consistent with the observed species is proposed.

• Research Organization: Chemistry Department, The University of Alabama, Tuscaloosa, Alabama 35486
• OSTI ID: 6532527
• Journal Information: J. Chem. Phys.; (United States), Vol. 78:5
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ORGANIC FLUORINE COMPOUNDS
RADIOLYSIS
AMIDES
ELECTRON SPIN RESONANCE
ULTRALOW TEMPERATURE
X RADIATION
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RESONANCE
400600* - Radiation Chemistry