Kinetics of the reactions of HCO with H and D atoms

H. Ziemer, S. Dóbé, H. Gg Wagner, M. Olzmann, B. Viskolcz, F. Temps

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The rate constants for the reactions HCO+H→products (1) and HCO+D→products (2) were determined at room temperature in an isothermal discharge flow reactor. Atom and radical concentrations in the reactions were monitored using Electron Paramagnetic Resonance (EPR) for H and D atoms and Far Infrared Laser Magnetic Resonance (FIR-LMR) and Laser Induced Fluorescence (LIF) for HCO. The overall rate constants describing the decay of the HCO concentrations with H and D, respectively, were found to be k1 = (6.8±2.0)×1013 cm3 mol-1 s-1 and k2 = (8.3±2.5)×1013 cm3 mol-1 s-1. The results are discussed assuming a mechanism that allows for parallel reaction pathways via a direct H atom abstraction reaction or via an addition-elimination reaction through a short-lived highly vibrationally excited formaldehyde complex.

Original languageEnglish
Pages (from-to)897-905
Number of pages9
JournalBerichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
Issue number7
Publication statusPublished - dec. 1 1998


ASJC Scopus subject areas

  • Chemical Engineering(all)

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