GAS PHASE DECOMPOSITION OF T-BUTYL METHYL ETHER CATALYZED BY DIFFERENT HYDROGEN HALIDES: A DFT STUDY

S. Cuesta, J. Mora, E. Márquez
{"title":"GAS PHASE DECOMPOSITION OF T-BUTYL METHYL ETHER CATALYZED BY DIFFERENT HYDROGEN HALIDES: A DFT STUDY","authors":"S. Cuesta, J. Mora, E. Márquez","doi":"10.26807/ia.v10i2.237","DOIUrl":null,"url":null,"abstract":"The gas phase decomposition of t-butyl methyl ether catalyzed by hydrogen halides is studied. Four different hydrogen halides (fluorine, chlorine, bromine, and iodine) were evaluated to determine the electronic influence of the halogen in the reaction mechanism. To describe the mechanism, the ωB97XD/LANL2DZ level of theory was used. The reactivity order found was F<Cl<Br<I. Interestingly, the activation free energy estimated for the HCl model was 133.9 kJ/mol, which is in good agreement with the experimental one (134.3 kJ/mol). Furthermore, a correlation above 0.804 was noticed when the electronegativity, the hydrogen-halide distance, and the pKa of the hydrogen halides were compared to the thermodynamic parameters (activation free energy, enthalpy, and entropy). Analyzing the mechanism in depth through the intrinsic reaction coordinate, reaction force, and reaction electronic flux plots, it was observed that though the reaction occurs in a one-step concerted way. The mechanism could be divided into two events; the first one composed by a proton transfer from the halide to the oxygen and the carbon-oxygen bond cleavage, and the second one being the rate-limiting event which includes the proton transfer from the t-butyl to the halide and the double bond formation. \n ","PeriodicalId":52933,"journal":{"name":"infoANALITICA","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"infoANALITICA","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.26807/ia.v10i2.237","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

The gas phase decomposition of t-butyl methyl ether catalyzed by hydrogen halides is studied. Four different hydrogen halides (fluorine, chlorine, bromine, and iodine) were evaluated to determine the electronic influence of the halogen in the reaction mechanism. To describe the mechanism, the ωB97XD/LANL2DZ level of theory was used. The reactivity order found was F
不同卤化氢催化t -丁基甲基醚气相分解的DFT研究
研究了卤化氢催化甲基叔丁基醚的气相分解。评估了四种不同的卤化氢(氟、氯、溴和碘),以确定卤素在反应机理中的电子影响。为了描述机理,采用了理论中的ωB97XD/LANL2DZ能级。反应顺序为F
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
12
审稿时长
12 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信