Temperature dependence of the rate of reaction of C2H with H2.

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

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Authors: Shahla K. Farhat, C. L. Morter, G. P. Glass

Published: September 1993 in The Journal of Physical Chemistry volume 97 (49) pages 12789-12792.

Abstract
The rates of reaction of C2H with H2 and C2H2 have been measured over the temperature range 295-854 K. The C2H radical was produced by excimer laser photolysis of C2H2 at 193 nm, and its transient absorption was monitored throughout the reaction by using a turntable infrared color-center laser. The temperature dependence of the rate constant for the reaction with H2 exihibited a non-Arrhenius form that could be well represented by the following expression: k = (9.44 ± 0.24) X 10-14 T0.9 exp(-1003 ± 20/T) cm3 molecule-1 s-1. The rate constant for the reaction with C2H2 displayed no definite temperature dependence. It was measured as (1.6 ± 0.3) X 10-10 cm3 molecule-1 s-1.