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Kinetics of Reactions of C2H Radical With Acetylene, O2, Methylacetylene, and Allene in a Pulsed Laval Nozzle Apparatus at T = 103 K



A B. Vakhtin, Dwayne E. Heard, I W. Smith, S R. Leone


The rate constants of the reactions of C2H radical with HCidentical with}CH (k1), O2(k2), CHd3^Cidentical with}CH(k3), and H2C=C=CH2(k4) are measured at 103 K using a pulsed Laval nozzle supersonic expansion and the CH(A2δ) chemiluminescence monitor method: k1 = (1.3 0.3) x 10-10, k2 = (3.8 0.9)x10-11, k3 = (2.7 0.6) x 10-10, and k4 = (2.5 0.6)x10-10 cm3 molecule-1 s-1. These values are compared to previous results and measurements in a continuous Laval nozzle apparatus (accompanying paper by Carty et al.). The non-Arthenius behavior and possible implications of the results for atmospheric chemistry of Titan are discussed.
Chemical Physics Letters
No. 3-4


ethynyl radical, low temperature kinetics


Vakhtin, A. , Heard, D. , Smith, I. and Leone, S. (2001), Kinetics of Reactions of C<sub>2</sub>H Radical With Acetylene, O<sub>2</sub>, Methylacetylene, and Allene in a Pulsed Laval Nozzle Apparatus at T = 103 K, Chemical Physics Letters (Accessed February 22, 2024)
Created July 31, 2001, Updated October 12, 2021