Highly excited 2-butyl radicals have been generated by addition of hot hydrogen atoms to but-2-ene. Atoms of initial energy 130 k J mol-' and 161 kJ mol-' were produced by photolysis of HzS. Rates of decomposition of the highly excited 2-butyl radicals were monitored by analysis of stabilization and decomposition products, and the extent of energy-loss of the hydrogen atoms in nonreactive collisions assessed by measuring the effect of added xenon on product yields. A model involving the cross-section for the addition reaction, energy transfer in nonreactive collisions between hydrogen atoms and but-2-ene, RRKM rate constants for decomposition of excited 2-butyl radicals, and collisional energy transfer from the radicals, has been used to calculate product yields for comparison with experimental values. It is concluded that the cross-section for addition of hydrogen atoms of energy about 130 kJ mol to but-2-ene is 0.055 ? 0.028 nm'. This value is compatible with the A factor for the thermal addition reaction.
Kinetic studies of oxidation of alanine by N-chlorosuccinimide (NCIS) have been investigated at different pH’s. The reaction shows consecutive first order reaction with respect to both oxidant and substrate. Fractional order were observed in hydrogen ion and manganeseion. Slight effect of addition of reaction product (succinimide) on the rate of oxidation reaction have been noticed. Changing the ionic strength had no effect on the rate of oxidation reaction. Cl+ or NClS and NClS protonated were suggested to be the reactive species of N-chlorosuccinimide. An intermediates compounds have been found and proved by using michaelis menton equation. A reaction mechanism for the oxidation reaction was suggested.
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