A kinetic study of the reaction between (C)over-dotH3 radicals and azoisopropane;: reactions of the radicals (C)over-dot-H3, (CH3)2(C)over-dot-N=NCH(CH3)2 and (CH3)2CH(N)over-dot-N(CH3)CH(CH3)2

The reaction of (C) over dot H-3 generated from di-tert-butyl peroxide with azoisopropane (AIP) in the temperature range 395-450 K was investigated by product analysis. The regioselectivity of (C) over dot H-3 With the carbon and nitrogen radical centres of (CH3)(2) (C) over dot N=NCH(CH3)(2) was determined: [GRAPHICS] The Arrhenius parameters of the H-abstraction and decomposition reactions [GRAPHICS] relative to the combinations [GRAPHICS] were determined: log[(k(3) /k(13)(1/2))/mol(-1/2) dm(3/2)s(-1/2)] = (3.1 +/- 0.3)-(30.6 +/- 2.4) kJ mol(-1)/theta log[k(23) (phi k(26)(1/2))(-1)/mol(1/2) dm(-3/2) s(-1/2)] = (8.8 +/- 0.5) - (110.0 +/- 6.5) kJ mol(-1)/theta where theta = RT In 10 and phi is the cross-combination ratio of (C) over dot H-3 and (CH3)(2)CH(N) over dot N(CH3)CH(CH3)(2).