Low-pressure yields of stabilized Criegee intermediates CH3CHOO and (CH3)2COO in ozonolysis of trans-2-butene and 2,3-dimethyl-2-butene

被引：11

作者：

Campos-Pineda, Mixtli ^{[1
]}

Zhang, Jingsong ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 683卷

基金：

美国国家科学基金会;

关键词：

Ozonolysis; Stabilized Criegee intermediates; Cavity ring-down spectroscopy; ABSORPTION-MEASUREMENTS; CARBONYL OXIDES; SO2; CH2OO; KINETICS; OXIDATION; CHEMISTRY; MECHANISM; SPECTRUM; OZONE;

D O I：

10.1016/j.cplett.2017.04.089

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cavity ring-down spectroscopy (CRDS) and chemical titration with sulfur dioxide (SO2) were used to indirectly measure the yields of stabilized Criegee intermediates (sCIs) produced from ozonolysis of trans-2-butene and 2,3-dimethyl-2-butene at low pressures in the range of 2-60 Torr. In the case of trans-2-butene, the yield of sCI was found to decrease with decreasing pressure and reach zero at the zero-pressure limit. For 2,3-dimethyl-2-butene, the sCI yield also decreased with decreasing pressure but reached a minimum of 12 +/- 5% at the zero-pressure limit, corresponding to the nascent fraction of CI formed with internal energy below the barriers of dissociation/isomerization. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：647 / 652

页数：6

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