Abstract: | The rate constant for the reaction has been determined by means of vacuum ultraviolet flash photolysis and time-resolved kinetic spectroscopic observations of the 1504-Å absorption band of CH3. The measurements made using three different sources of methyl radicals (azomethane, dimethylmercury, and ketene-hydrogen) were in accord and yielded a value for the rate constant of k1 = (9.53 ± 1.17) × 10?11 cc molec?1 sec?1. A detailed error analysis is presented. The f-value for the 1504-Å band of CH3 is determined to be (2.5 ± 0.7) × 10?2. |