Low pressure rate coefficients of the reaction of O(3P) with CF3I and CH3

M. TERUEL

Wiley

Año: 2008 vol. 21 p. 1043 - 1043

Absolute rate coefficients for the gas-phase reactions of CF3I and CH3I with O(3P) atoms were measured at 298 K by the discharge flow technique coupled to resonance fluorescence to monitor O(3P) atoms. This is the first kinetic study for these reactions under low-pressure conditions (1.56–3.26 Torr). The overall rate coefficients were (5.2W0.7)T10S12 and (2.3W0.3)T10S11 cm3 moleculeS1 sS1, respectively. The experiments were carried out under pseudo-first-order conditions with [O(3P)]0[RI]0. The results are compared with previous measurements using different experimental techniques at higher pressures. Free energy relationships and atmospheric implications are discussed.