KINETICS OF THE DS-RADICAL REACTIONS WITH CLNO AND NO2

The rate constants for the reactions of the DS radical with NO2 (react ion 1) and ClNO (reaction 2) have been measured using the discharge-fl ow technique at 2 torr total pressure of helium. The DS radical was mo nitored by laser-induced fluorescence. The reactions were found to hav e the following bimolecular rate constants (95% confidence level, in u nits of cm3 molecule-1 s-1): k1 = (3.4 +/- 0.8) x 10(-11) exp[(210 +/- 70)/T] k2 = (2.2 +/- 0.5) x 10(-11) exp[(-480 +/- 100)/T] This expres sion for k1 is found to be in excellent agreement with one of several previous studies. The magnitude of k2 is examined within the framework of a well-established reactivity trend. (C) 1994 John Wiley & Sons, I nc.