On the Proton Affinity of Peroxynitrite and Peroxynitrous Acid

The proton affinity (PA) of peroxynitrite (ONOO(-)) and peroxynitrous acid (ONOOH) are calculated to be 1440.5 kJ mol(-1) and 749.8 kJ mol(-1), respectively. Comparison with results for the nitrous, nitric and peroxynitric acid and their anions supports these estimates.