KINETICS AND THERMOCHEMISTRY OF CHLORINE-CONTAINING AND NITROGEN-CONTAINING OXIDES AND PEROXIDES

A valence bond additivity scheme based on established thermochemical d ata is able to reproduce the heats of formation of novel species such as O2ClONO2, ClOClO2, ONONO2, ClOONO, HOONO, FOClO3, and FONO within /- 2 kcal/mol. This finding, together with recently obtained values of DELTAH(f)-degrees-(ClO3(g)) and DELTAH(f)-degrees-(ClO4-(g)), makes p ossible a general analysis of the thermal stabilities of known or conc eivable chlorine and nitrogen oxides of potential atmospheric signific ance. Radical mechanisms for the decompositions of chlorine hexoxide a nd perchloric acid are also discussed.