Mechanisms of Methylenecyclobutane Hydrogenation over Supported Metal Catalysts Studied by Parahydrogen‐Induced Polarization Technique Full article
| Journal |
ChemPhysChem
ISSN: 1439-4235 , E-ISSN: 1439-7641 |
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| Output data | Year: 2022, Volume: 23, Number: 7, Article number : e202200072, Pages count : 11 DOI: 10.1002/cphc.202200072 | ||||||
| Tags | heterogeneous catalysis • hydrogenation • hyperpolarization • methylenecyclobutane • NMR spectroscopy • parahydrogen | ||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Russian Foundation for Basic Research | 19-33-60045 |
| 2 | Russian Science Foundation | 21-73-10105 (121121600301-4) |
| 3 | Russian Foundation for Basic Research | 19-29-10003 (АААА-А19-119100890052-8) |
Abstract:
In this work the mechanism of methylenecyclobutane hydrogenation over titania-supported Rh, Pt and Pd catalysts was investigated using parahydrogen-induced polarization (PHIP) technique. It was found that methylenecyclobutane hydrogenation leads to formation of a mixture of reaction products including cyclic (1-methylcyclobutene, methylcyclobutane), linear (1-pentene, cis-2-pentene, trans-2-pentene, pentane) and branched (isoprene, 2-methyl-1-butene, 2-methyl-2-butene, isopentane) compounds. Generally, at lower temperatures (150–350 °C) the major reaction product was methylcyclobutane while higher temperature of 450 °C favors formation of branched products isoprene, 2-methyl-1-butene and 2-methyl-2-butene. PHIP effects were detected for all reaction products except methylenecyclobutane isomers 1-methylcyclobutene and isoprene implying that the corresponding compounds can incorporate two atoms from the same parahydrogen molecule in a pairwise manner in the course of the reaction in particular positions. The mechanisms were proposed for the formation of these reaction products based on PHIP results.
Cite:
Salnikov O.G.
, Burueva D.B.
, Kovtunova L.M.
, Bukhtiyarov V.I.
, Kovtunov K.V.
, Koptyug I.V.
Mechanisms of Methylenecyclobutane Hydrogenation over Supported Metal Catalysts Studied by Parahydrogen‐Induced Polarization Technique
ChemPhysChem. 2022. V.23. N7. e202200072 :1-11. DOI: 10.1002/cphc.202200072 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Mechanisms of Methylenecyclobutane Hydrogenation over Supported Metal Catalysts Studied by Parahydrogen‐Induced Polarization Technique
ChemPhysChem. 2022. V.23. N7. e202200072 :1-11. DOI: 10.1002/cphc.202200072 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Dates:
| Submitted: | Jan 28, 2022 |
| Published online: | Jan 31, 2022 |
| Published print: | Apr 5, 2022 |
Identifiers:
| Web of science: | WOS:000766103300001 |
| Scopus: | 2-s2.0-85126069964 |
| Elibrary: | 48191270 |
| Chemical Abstracts: | 2022:659724 |
| Chemical Abstracts (print): | 178:174832 |
| PMID: | 35099100 |
| OpenAlex: | W4210293819 |