大气中羟基自由基与二甲基二硫反应中的SO生成及过氧自由基异构化
SO formation and peroxy radical isomerization in the atmospheric reaction of OH radicals with dimethyl disulfide.
作者信息
Berndt Torsten, Chen Jing, Møller Kristian H, Hyttinen Noora, Prisle Nønne L, Tilgner Andreas, Hoffmann Erik H, Herrmann Hartmut, Kjaergaard Henrik G
机构信息
Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße. 15, 04318 Leipzig, Germany.
Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Ø, Denmark.
出版信息
Chem Commun (Camb). 2020 Nov 5;56(88):13634-13637. doi: 10.1039/d0cc05783e.
The atmospheric reaction of OH radicals with dimethyl disulfide, CH3SSCH3, proceeds primarily via OH addition forming CH3S and CH3SOH as reactive intermediates, and to a lesser extent via H-abstraction resulting in the peroxy radical CH3SSCH2OO in the presence of O2. The latter undergoes a fast two-step isomerization process leading to HOOCH2SSCHO. CH3S and CH3SOH are both converted to SO2 and CH3O2 with near unity yields under atmospheric conditions.
大气中羟基自由基与二甲基二硫醚（CH₃SSCH₃）的反应主要通过羟基加成生成CH₃S和CH₃SOH作为反应中间体进行，在有氧气存在的情况下，较少程度地通过氢原子提取生成过氧自由基CH₃SSCH₂OO。后者经历一个快速的两步异构化过程生成HOOCH₂SSCHO。在大气条件下，CH₃S和CH₃SOH都以接近单位产率转化为SO₂和CH₃O₂。
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