ABSTRACTION OF HALOGEN ATOMS BY METHYL RADICALS
SYRACUSE UNIV NY
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Halogen abstraction reactions, described by equation, RX .CH3 yields R. XCH3 were investigated in solution for R CH3, C2H5, iso-C3H7, t- C4H9, PhCH2, CH2Cl, CHCl2, CCl3 and CF3. Secondary deuterium effect was investigated for CH3 and CF3 addition reactions. Rate constants k sub 2Ik sub 1 and k sub 2Brk sub 1 were found to be 45 and 3 x 10 to the 3rd power respectively, k sub 1 being the rate constant of the reaction PhCH2 .CH3 yields PhCH2. CH4. The values of k sub 2Ik sub 1 and k sub 2Brk sub 1 are compared with k sub 2Hk sub 1. The activation energies difference E sub 2I - E sub 1 was determined as - 1.8 Kcalmole for the temperature range 55-85 C.
- Organic Chemistry