REACTION OF CYANOMETHYLENE WITH NITRIC-OXIDE AND OXYGEN AT 298 K - HCCN-2(NO, O)

The reactions of the cyanomethylene (HCCN) radical with nitric oxide ( NO) and with molecular oxygen (O-2) have been investigated using infra red kinetic spectroscopy. The overall second-order rare constant for e ach reaction has been determined using pseudo-first-order methods yiel ding (3.5 +/- 0.6) x 10(-11) cm(3) molecule(-1) s(-1) for the reaction with NO and (1.8 +/- 0.4) x 10(-12) cm(3) molecule(-1) s(-1) for the reaction with O-2. For each reaction, several products were observed, but none were quantified. Hydrogen cyanide (HCN) and fulminic acid (HC NO) were observed as products of the reaction with NO. For the reactio n with O-2, HCN, hydrogen isocyanide (HNC), and carbon dioxide (CO2) w ere observed. Species searched for but not detected from either reacti on include isocyanic acid (HNCO), cyanic acid (HOCN), formyl (HCO) rad ical, isofulminic acid (HONC), hydroxyl radical (OH), and ethynyl radi cal (C2H). In addition, NO was searched for, but not observed, as a pr oduct of the O-2 reaction. On the time scale of our experiments, no re action between HCCN and any of the following species was observed (k < 10(-13)) cm(3) molecule(-1) s(-1)): methane (CH4), CO2, acetylene (C2 H2), ethylene (C2H4), carbon monoxide (CO), and hydrogen (H-2).