SYRACUSE UNIV NY, Szwarc, M., Evans, F. W., Fox, R. J., Feld, M., Stenfani, A. P., SYRACUSE UNIV NY, Szwarc, M., Evans, F. W., Fox, R. J., Feld, M., and Stenfani, A. P.
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 2I/k sub 1 and k sub 2Br/k 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 2I/k sub 1 and k sub 2Br/k sub 1 are compared with k sub 2H/k sub 1. The activation energies difference E sub 2I - E sub 1 was determined as - 1.8 Kcal/mole for the temperature range 55-85 C., Report on The Chemistry and Physics of Materials.