Alkene Epoxidation Catalyzed by Ti-Containing Polyoxometalates: Unprecedented β‑Oxygen Transfer Mechanism Full article
Journal |
Inorganic Chemistry
ISSN: 0020-1669 , E-ISSN: 1520-510X |
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Output data | Year: 2016, Volume: 55, Number: 12, Pages: 6080-6084 Pages count : 5 DOI: 10.1021/acs.inorgchem.6b00621 | ||||||
Tags | MOLECULAR-ORBITAL METHODS; AB-INITIO; OLEFIN EPOXIDATION; OXIDATION; TITANIUM; DENSITY; H2O2; DFT; REACTIVITY; TITANOSILICATES | ||||||
Authors |
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Affiliations |
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Funding (3)
1 | Federal Agency for Scientific Organizations | V.44.2.2. |
2 | Government of Catalonia | 2014SGR199 |
3 | Ministry of Economic Affairs and Digital Transformation | CTQ2014-52774-P |
Abstract:
A DFT study revealed that the mechanism of alkene epoxidation with hydrogen peroxide catalyzed by Ti-containing polyoxometalates (POMs) depends on the Ti coordination environment: For rigid and hindered Ti centers, the unprecedented β-oxygen transfer from the titanium hydroperoxo species becomes favored over the α-oxygen one. Improving the model for catalyst description, the calculations were able to reproduce the Arrhenius activation energy values determined in kinetic studies. Unlike protonation, the possible ion-pairing between POMs and countercations has a minor effect on the electrophlicity of the catalyst and, consequently, on the activity of epoxidation.
Cite:
Jimenez-Lozano P.
, Skobelev I.Y.
, Kholdeeva O.A.
, Poblet J.M.
, Carbo J.J.
Alkene Epoxidation Catalyzed by Ti-Containing Polyoxometalates: Unprecedented β‑Oxygen Transfer Mechanism
Inorganic Chemistry. 2016. V.55. N12. P.6080-6084. DOI: 10.1021/acs.inorgchem.6b00621 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Alkene Epoxidation Catalyzed by Ti-Containing Polyoxometalates: Unprecedented β‑Oxygen Transfer Mechanism
Inorganic Chemistry. 2016. V.55. N12. P.6080-6084. DOI: 10.1021/acs.inorgchem.6b00621 WOS Scopus РИНЦ ANCAN PMID OpenAlex
Dates:
Submitted: | Mar 11, 2016 |
Published online: | May 27, 2016 |
Published print: | Jun 20, 2016 |
Identifiers:
Web of science: | WOS:000378369900044 |
Scopus: | 2-s2.0-84975482349 |
Elibrary: | 27138564 |
Chemical Abstracts: | 2016:866171 |
Chemical Abstracts (print): | 165:31133 |
PMID: | 27232155 |
OpenAlex: | W2408133551 |