Ion—Molecule Reactions in NO+–H2O System

Abstract

The following reaction sequence which occurs in ionized NO–H₂O or air—H₂O mixtures has been studied: $${\mathrm{NO}}^{+}+{\mathrm{H}}_2\mathrm{O}+\mathrm{M}\to {\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}\mathrm{)+}\mathrm{M},$$ $${\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}\mathrm{)+}{\mathrm{H}}_2\mathrm{O}+\mathrm{M}\to {\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}{)}_2+\mathrm{M},$$ $${\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}{)}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{M}\to {\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}{)}_3+\mathrm{M},$$ $${\mathrm{NO}}^{+}({\mathrm{H}}_2\mathrm{O}{)}_3+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_3{\mathrm{O}}^{+}({\mathrm{H}}_2\mathrm{O}{)}_2+{\mathrm{HNO}}_2.$$ The measurements were made at 295°K in a flowing afterglow system, and reactions were measured for M = He, Ar, and N₂.