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Author(s):   Hack, W.; Hold, M.; Hoyermann, K.; Wehmeyer, J.; Zeuch, T.
Title:   Mechanism and rate of the reaction CH3+O- revisited
Journal:   Phys. Chem. Chem. Phys.
Volume:   7
Page(s):   1977 - 1984
Year:   2005
Reference type:   Journal article
Squib:   2005HAC/HOL1977-1984

Reaction:   ·CH3 + CO + H2 +
Reaction order:   2
Reference reaction:   ·CH3 + → Products
Reference reaction order:   2
Temperature:   293 K
Pressure:  4.00E-3 bar
Rate expression:   4.6x10-1±6.0x10-2
Category:  Experiment
Data type:   Absolute value measured directly
Pressure dependence:   None reported
Experimental procedure:   Static or low flow - Data taken vs time
Excitation technique:   Flash photolysis (laser or conventional)
Time resolution:   In real time
Analytical technique:   Fourier transform (FTIR)
Comments:   A study of the major products and the reaction rate of methyl + O in the gas phase at room temperature was undertaken using three different experimental arrangements: (A) laser flash photolysis to produce CH3 and O from the precursors CH3I and SO2 (with quantitative detection of reactants and products via FTIR spectroscopy); (B) the coupling of a conventional discharge flow reactor to a mass spectrometer with electron impact ionization; and (C) laser induced multiphoton ionization combined with TOF mass spectrometer molecular beam sampling of a discharge flow reactor, which was used for the specific and sensitive detection of the CH3, CD3, C2H5 and C2D5 radicals and the determination of rate coefficients.

The listed branching ratio of the reaction channels was determined by experimental arrangement (B), above.

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