Absolute rate constants for the reactions of OH radicals with CCl₃CHO and CF₃CHO have been determined as a function of temperature using a pulsed laser photolysis-resonance fluorescence technique. The rate constant for reaction with CCl₃CHO, k(CCl₃CHO) equals 1.4 +/- 0.2 cm³ molecule^-1 s^-1, was found to be virtually independent of temperature over the range 233 - 313 K while the Arrhenius expression obtained for reaction with CF₃CHO was k(CF₃CHO) equals 3.5 +/- 1.0 X 10^-12 exp [-(488 +/- 57)/T] cm³ molecule^-1 s^-1. Reactivity trends and atmospheric implications are discussed.

Date Published: 12 February 1993
PDF: 13 pages
Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); doi: 10.1117/12.140210

Published in SPIE Proceedings Vol. 1715:
Optical Methods in Atmospheric Chemistry
Harold I. Schiff; Ulrich Platt, Editor(s)