Reactions of positive ions with ClN3 at 300Â K

► The kinetics of eighteen positive ions with chlorine azide (ClN3) have been studied. ► The ionization energy of ClN3 > 930 kJ mol−1 (>9.6 eV). ► The proton affinity of ClN3 is 713 ± 41 kJ mol−1. ► A reaction coordinate diagram for the novel reaction of N+ with ClN3 is discussed.