Temperature dependent CH 3 OCl formation in the reaction between CH 3 O 2  and ClO | Zendy

Helleis Frank | Zendy; Crowley John | Zendy; Moortgat Geert | Zendy

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Temperature dependent CH 3 OCl formation in the reaction between CH 3 O 2 and ClO

Author(s) -

Helleis Frank,

Crowley John,

Moortgat Geert

Publication year - 1994

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/94gl01280

Subject(s) - reaction rate constant , chemistry , branching (polymer chemistry) , analytical chemistry (journal) , physics , kinetics , organic chemistry , quantum mechanics

The reaction CH 3 O 2 + ClO → CH 3 OCl + O 2 (2b) has been investigated at temperatures of 295, 255, 230 and 215 K. The temperature dependent branching ratio for CH 3 OCl formation (α 2b ) is given by α 2b = (T/300) −1.65 −0.223exp(411/T). The result at 200 K ( ca 0.23) can be combined with our previous determination of the overall rate constant for the reaction between CH 3 O 2 + ClO [ Helleis et al, 1993] to calculate a channel specific rate constant for reaction 2b of ca (4.1±1) × 10 −13 cm³ molecule −1 s −1 at the temperatures prevalent in the lower polar stratosphere at springtime.

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