transform infrared (FT-IR) spectroscopy. For the OH + IMMP reaction, the major initial products appear to be CH3OP(O)(CH3)OC(O)CH3 + •CH3, with subsequent reactions of the methyl radical in the presence of NOx leading to HCHO, CH3ONO, and CH3ONO2. For the OH + DMDMPA reaction, (CH3O)2P(O)N(CH3)CHO was observed as a significant product. Possible reaction mechanisms are discussed.
OH自由基与异丙基甲基
甲基膦酸酯[(CH 3)2 CHOP(O)(CH 3)OCH 3的反应速率常数;IMMP]和N,N-二甲基
氨基膦酸二甲酯[(CH 3 O)2 P(O)N(CH 3)2;[
DMDMPA]已使用相对速率法在283-350 K的温度范围和大气压力下进行了测量。获得的比率表达式为2.72×10 -13 e (1642±144)/ T cm 3分子-1 s -1(6.72×10 -11 cm3分子-1小号-1在298 K)为OH + IMMP和6.05×10 -13 È (1185±144)/ Ť厘米3分子-1小号-1(3.23×10 -11厘米3个分子-1小号-对于OH +
DMDMPA,在298 K时为1)。此外,测量了NO 3自由基和O 3与IMMP反应的速率常数为(4.8±2.1)×10 -16和<7×10 -20 cm 3分子-1 s -1的296±2 K, 分别。使