Abstract
The rate constants of eleven hydrocarbons and fluorocarbons with CN (V=0, 1) at 300K have been measured by using Laser Induced Fluorescence(LIF) method. For the saturated hydrocarbons, the rate constants are chagned from (5.6 +/- 0.3) x 10(-13) for CH4 to (2.3 + 0.2) x 10(-10)cm(3) molecu(-1),8(-1) for C7H16. The rate constants of the reaction of CN with alkenes and alkynes are close to the gas kinetic rate in spite of the structure of the molecules. The rate constants and mechanism of CN with the saturated hydrocarbons, H-2 and CH3OH can be explained satisfactorily by the long distance attractive potential. The reaction of CN with alkenes and alkynes can only proceed through the addition into pi bond. The influence of vibrational energy on the reaction rate was not found in the reactions of CN radical with hydrocarbon compounds.
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