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

✍ Scribed by D. M. Haaland; R. T. Meyer

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
591 KB
Volume
6
Category
Article
ISSN
0538-8066

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✦ Synopsis

The: rate constant for the reaction I(2P1,2) + CH3I + I:! + CH3 has been reevaluated taking into account both collisional deactivation of excited iodine atoms and loss of 12

The reevaluation is based upon data obtained (R. T. Meyer, J. Chem. Phys., 46, 4146 (1967)] from the flash photolysis of CH31 using time-resolved mass spectrometry to measure the rate of 1 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( f 4) X lo6 l./mole-sec for the excited iodine atom reaction in the temperature region of 316 to 447 K. A slight temperature dependence was observed, but an activation energy could not be evaluated quantitatively due to the small temperature range studied. An upper limit for the collisional deactivation of I(2P1,2) with CH3I was also determined (2.4 X lo' I./mole-sec).

I 4-CH3I.

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