Torr of N2 as a bath gas. Because HCO and HCCO radicals were observed as reaction products, it was confirmed that the reaction proceeds by a two-body reaction. On the other hand, the rate constants of NCCO with O2 depended on the total pressure and were (5.4–8.8) × 10−13 cm3 molecule−1 s−1 for total pressures 2.0–15.5 Torr of N2, confirming that the reaction proceeds by a three-body process. © 2001 John
HCCCO 和 NCCO 自由基与 O2 的反应已经通过脉冲激光光解和光电离质谱法的组合进行了研究。HCCCO 由
丙炔酸甲酯或 3-butyn-2-one 的 193-nm 光解产生,而 NCCO 由乙酰
氰的 193-nm 光解形成。对于 HCCCO + O2 反应,在 298 ± 3 K 获得的速率常数为 (6.5 ± 0.7) × 10-12 cm3 分子-1 s-1,并且在 N2 作为浴气的 1.5 和 16 Torr 之间没有观察到压力依赖性. 因为作为反应产物观察到HCO和HCCO自由基,证实反应通过二体反应进行。另一方面,NCCO 与 O2 的速率常数取决于总压力,并且对于总压力为 2.0-15.5 Torr 的 N2 为 (5.4-8.8) × 10-13 cm3 分子-1 s-1,证实反应进行通过三体过程。