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Reaction of excited iodine atoms with methyl iodide: rate constant determinations

Journal Article · · Int. J. Chem. Kinet.; (United States)
The rate constant for the reaction I(/sup 2/P/sub 1/2/) + CH/sub 3/I ..sigma.. I/sub 2/ + CH/sub 3/ has been reevaluated taking into account both collisional deactivation of excited iodine atoms and loss of I/sub 2/ by I/sub 2/ + CH/sub 3/ ..sigma.. I + CH/sub 3/I. The reevaluation is based upon data obtained from the flash photolysis of CH/sub 3/I using time-resolved mass spectrometry to measure the rate of I/sub 2/ formation. Computer simulations of the complete kinetic system and a closed-form solution of a simplified set of the differential equations yielded a value of 6(+/- 4) x 10/sup 6/ 1./mole-sec for the excited iodine atom reaction in the temperature region of 316 to 447 K. A slight temperature dependence was observed.
Research Organization:
Sandia Lab., Albuquerque, NM
OSTI ID:
6898582
Journal Information:
Int. J. Chem. Kinet.; (United States), Journal Name: Int. J. Chem. Kinet.; (United States) Vol. 6; ISSN IJCKB
Country of Publication:
United States
Language:
English