Rate constants for the gas-phase reaction of hexamethylbenzene with OH radicals and H atoms and of 1,3,5-trimethylbenzene with H atoms

Abstract

Rate constants for the gas-phase reaction of hexamethylbenzene (HMB) with OH radicals and H atoms and of 1,3,5-trimethylbenzene (TMB) with H atoms have been obtained in a flow system at 295±2 K and a pressure of 25 mbar He using MS measurements. Obtained rate constants from a relative rate technique are k(OH+HMB) = (1.13±0.11) 10-10, k(H+HMB) = (5.9±3.4) 10-13 and k(H+TMB) = (4.6±2.7) 10-13 cm3 molecule-1 s-1, respectively.