Protonated Methylcyclopropane is an Intermediate Providing Complete 13C-Label Scrambling at C4 Olefin Isomerization in Zeolite Full article
Journal |
Chem Catalysis
ISSN: 2667-1093 |
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Output data | Year: 2023, Volume: 3, Number: 2, Article number : 100503, Pages count : 15 DOI: 10.1016/j.checat.2022.100503 | ||||||||||||
Tags | zeolite; carbocations; three-center two-electron; monomolecular mechanism; bimolecular mechanism; reaction intermediate; protonated methylcyclopropane; skeletal rearrangement; confinement effect | ||||||||||||
Authors |
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Affiliations |
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Funding (10)
1 | National Natural Science Foundation of China | 22125304 |
2 | National Natural Science Foundation of China | 22032005 |
3 | National Natural Science Foundation of China | 22002174 |
4 | National Natural Science Foundation of China | 21902180 |
5 | National Natural Science Foundation of China | 21991092 |
6 | National Natural Science Foundation of China | 21773230 |
7 | National Natural Science Foundation of China | 91945302 |
8 | European Commission | 2021YFA1502600 |
9 | European Commission | 2022YFE0116000 |
10 | National Science Foundation | HRD-1736093 |
Abstract:
Carbocations play crucial roles during catalytic reactions by dictating the reaction pathways and genuine mechanisms, but the instability of carbocations prevents thorough observations. The stabilization of carbocations would greatly help us gain a deep understanding of the reaction mechanisms. By means of ab initio molecular dynamics (AIMD) simulations and an in situ experimental approach, a complete scrambling of 13C-labeled C4= products was observed during the isomerization reaction in the H-ZSM-5 zeolite at room temperature, and the corner-protonated methylcyclopropanes (as a non-classical carbocation) featuring the three-center two-electron (3c–2e) bonds were confirmed to be the highly active metastable intermediates of C4 isomerization. Our results not only uncover the nature of facile C shift in carbocations during zeolite-catalyzed reactions but also bring some fundamental understandings to carbocation chemistry in a zeolite confined environment.
Cite:
Chen W.
, Huang M.
, Yi X.
, Hui Y.
, Gao P.
, Hou G.
, Stepanov A.G.
, Qin Y.
, Song L.
, Liu S-B.
, Chen Z.
, Zheng A.
Protonated Methylcyclopropane is an Intermediate Providing Complete 13C-Label Scrambling at C4 Olefin Isomerization in Zeolite
Chem Catalysis. 2023. V.3. N2. 100503 :1-15. DOI: 10.1016/j.checat.2022.100503 WOS Scopus РИНЦ ANCAN OpenAlex
Protonated Methylcyclopropane is an Intermediate Providing Complete 13C-Label Scrambling at C4 Olefin Isomerization in Zeolite
Chem Catalysis. 2023. V.3. N2. 100503 :1-15. DOI: 10.1016/j.checat.2022.100503 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: | Oct 17, 2022 |
Accepted: | Dec 29, 2022 |
Published online: | Jan 24, 2023 |
Published print: | Feb 16, 2023 |
Identifiers:
Web of science: | WOS:000943989800001 |
Scopus: | 2-s2.0-85148008072 |
Elibrary: | 54903593 |
Chemical Abstracts: | 2023:379363 |
Chemical Abstracts (print): | 182:423439 |
OpenAlex: | W4317897803 |