GAS-PHASE REACTIONS OF CL2O WITH NO- (X=2,3)-CENTER-DOT(D2O)(N=0-2) AND CL-CENTER-DOT(D2O)(N=0-2)

The results of laboratory measurements are reported for the reactions of Cl2O with NO2-.(D2O)(n=0-2), NO3-.(D2O)(n=0-2), and Cl-.(D2O)(n=0-2 ). These were studied using a flow-tube apparatus at several temperatu res within the range 168-298 K and at a helium buffer gas pressure of 0.30+/-0.02 Torr. Rate constants for primary reactions and product ion s observed in various reaction sequences are reported, along with a di scussion of possible reaction mechanisms. The findings contribute to a further mechanistic understanding of ionic reactions as well as other heterogeneous ones involving chlorine-containing molecules. Interesti ngly, evidence for a water-catalyzed reaction between Cl2O and Cl-/NO3 - was obtained, Also, the present findings suggest that several ionic reactions may lead to the formation of ClONO2 as a neutral product, Fi nally, limits on the electron affinity of Cl2O are determined to be 2. 52 eV less than or equal to EA(Cl2O) less than or equal to 3.617 eV.