The main pathways of the reaction HCCO+NO→products (1) were investigated at room temperature in the gas phase in Ar at 570 mbar pressure by employing FTIR spectroscopy. Mixtures of NO2–C2H2–NO–Ar were photolysed under stationary conditions using a high-pressure Hg lamp at λ=312 nm. HCCO was generated in the reaction system in the reactions NO2+hν→O(3P)+NO, O(3P)+C2H2→H+HCCO. The main products of reaction (1) include CO2, CO, and HCNO. The results can be rationalised with the reaction channels HCCO+NO→HCN+CO2 (1a) and HCCO+NO→HCNO+CO (1d). The branching ratios were determined to be k1a/k1=(0.28±0.10) and k1d/k1=(0.64±0.12). Formation of HNCO could not be confirmed. Other species detected include H2O and HONO. These are formed, together with additional CO, in consecutive reactions of H atoms and OH radicals.
在室温下,通过在570毫巴压力的
氩气中使用FTIR光谱技术,研究了反应HCCO+NO→产物(1)的主要途径。在稳态条件下,使用波长为312纳米的高压
汞灯对
NO2-
C2H2-NO-Ar混合物进行光解。HCCO通过反应 +hν→O(3P)+NO和O(3P)+ →H+HCCO在反应系统中生成。反应(1)的主要产物包括
CO2、CO和HCNO。结果可以用反应通道HCCO+NO→HCN+ (1a)和HCCO+NO→HCNO+CO(1d)来解释。分支比确定为k1a/k1=(0.28±0.10)和k1d/k1=(0.64±012)。未能确认HNCO的形成。检测到的其他物种包括
H2O和HONO,这些是在H原子和OH自由基的连续反应中形成,同时还生成了额外的CO。