Rate constants for the reactions of CO3- and O3- with SO2 from 300 to 1440 K

The Journal of Chemical Physics
Thomas M MillerA A Viggiano

Abstract

Rate constants for the reactions of CO(3) (-) and O(3) (-) with SO(2) have been measured between 300 and 1440 K in a high temperature flowing afterglow apparatus. The CO(3) (-) rate constants near to the collision rate at low temperatures and fall by about a factor of 50 with temperature until a broad minimum is reached at 900-1300 K. The highest temperature point shows the increasing rate constant. Comparison to drift tube data taken in a helium buffer shows that total energy controls the reactivity, presumably because the reaction goes through a long lived complex even at 1440 K. The reaction of O(3) (-) with SO(2) was studied up to 1400 K. The rate constant is collisional until 700 K and then decreases with increasing temperature. Rate constants measured at 1300 and 1400 K appear to show an increase, but that observation is questionable since O(3) (-) could not be made cleanly. The O(3) (-) data at 1200 K and below show that total energy controls reactivity in that range.

References

Oct 12, 2004·The Journal of Chemical Physics·Anthony J MideyA A Viggiano
Nov 13, 2004·The Journal of Chemical Physics·Svetozar PopovicK Morokuma

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Citations

Mar 29, 2007·The Journal of Physical Chemistry. a·Larry A ViehlandDouglas E Goeringer
Jul 10, 2019·Journal of the American Society for Mass Spectrometry·Anna TroianiGiulia de Petris

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