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Accessibility information
Author(s):   Persky, A.
Title:   The temperature dependence of the rate constants for the reactions F+CH3F and F+CH2F2
Journal:   Chem. Phys. Lett.
Volume:   376
Page(s):   181 - 187
Year:   2003
Reference type:   Journal article
Squib:   2003PER181-187

Reaction:   CH2F2 + ·F·CHF2 + HF
Reaction order:   2
Temperature:   182 - 298 K
Pressure:  1.33E-3 - 2.00E-3 bar
Rate expression:   3.7x10-11 [±4.5x10-12 cm3/molecule s] e-4781 [±499 J/mole]/RT
Category:  Experiment
Data type:   Relative value normalized by a reference value
Experimental procedure:   Flow tube - Data taken vs distance
Excitation technique:   Discharge
Time resolution:   By end product analysis
Analytical technique:   Mass spectrometry
Comments:   Absolute rate was determined relative to F + D2 -> DF + D, for which the authors used k/cm3 molec-1 s-1 = (1.06 +/- 0.12)x10-10exp[-(635 +/- 55)/T] in the temperature range 190-376 K (A. Persky, H. Kornweitz, Int. J. Chem. Kinet. 29 (1997) 67).

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Rate constant values calculated from the Arrhenius expression:

T (K)k(T) [cm3/molecule s]
182 1.57E-12
200 2.09E-12
225 2.87E-12
250 3.71E-12
275 4.57E-12
298 5.37E-12