10.1021/jp962686g
The research investigates the reactions of the cyanomethylene (HCCN) radical with nitric oxide (NO) and molecular oxygen (O2) at 298 K using infrared kinetic spectroscopy. The study determines the overall second-order rate constants for these reactions as (3.5 ± 0.6) × 10^-11 cm3 molecule^-1 s^-1 for HCCN + NO and (1.8 ± 0.4) × 10^-12 cm3 molecule^-1 s^-1 for HCCN + O2. For the reaction with NO, hydrogen cyanide (HCN) and fulminic acid (HCNO) were observed as products, while for the reaction with O2, HCN, hydrogen isocyanide (HNC), and carbon dioxide (CO2) were identified. The study also searched for but did not detect several other potential products, including isocyanic acid (HNCO), cyanic acid (HOCN), formyl radical (HCO), isofulminic acid (HONC), hydroxyl radical (OH), and ethynyl radical (C2H). The research concludes that the observed products are likely formed through secondary processes rather than directly from the reactions of HCCN with NO or O2.