The temperature dependence of the rate constant for Cl+NO+N2 → NOCl+N2

The rate constant for the reaction Cl+NO+N2→k1 ClNO+N2, of interest in stratospheric chemistry, has been measured by the flash photolysis–resonance fluorescence technique over the temperature range 200–400 K. The measured rate constants obey the Arrhenius equation k1,N2= (1.18±0.10) ×10−32 exp[(532±20)/T] cm6 molecule−2 sec−1. At room temperature with the two additional third bodies, He and Ar, the measured termolecular rate constants are k1,He= (4.11±0.20) ×10−32 and k1,Ar= (4.40±0.30) ×10−32 cm6 molecule−2 sec−1. These results are theoretically discussed and are compared with previous work.