NO(B 2Πr and A 2Σ+) chemiluminescence from the reaction C+NO2 → CO+NO at 300 K

The C+NO2→CO+NO reaction at 300 K has been shown to exhibit a strong ultraviolet chemiluminescence from NO (B 2Πr) and a weak one from NO(A 2Σ+). The NO (B 2Πr)v′=0 production rate was found to be approximately ten times greater than that of NO (A 2Σ+)v′=0. No chemiluminescence either from NO(C 2Πr) or NO (D 2Σ+), however energetically accessible, could be observed. These features are in close agreement with the Cs symmetry correction diagram for this reaction. The nascent vibrational distribution of NO(B 2Πr) was found to be much cooler than the prior statistical one.