Rate Constant for the Ring Opening of the 2,2-Difluorocyclopropylcarbinyl Radical.
The rate constant for the unimolecular ring opening of the 2,2-difluorocyclopropylcarbinyl radical was determined via its competitive bimolecular trapping by TEMPO. The value of this rate constant (3.4 x 10(11) s(-)(1) at 99.3 degrees C) is about 500 times larger than that of the parent, unfluorinated radical and about 5 times smaller than that of the trans-2-phenylcyclopropylcarbinyl radical.
Tian
F
Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200.
Dolbier
WR