A1 Journal article (refereed)
Amide functionalized aminobisphenolato MoO2 and WO2 complexes : Synthesis, characterization, and alkene epoxidation catalysis (2023)


Salonen, P., Schachner, J. A., Peuronen, A., Lahtinen, M., Belaj, F., Mösch-Zanetti, N. C., & Lehtonen, A. (2023). Amide functionalized aminobisphenolato MoO2 and WO2 complexes : Synthesis, characterization, and alkene epoxidation catalysis. Molecular Catalysis, 540, Article 113034. https://doi.org/10.1016/j.mcat.2023.113034


JYU authors or editors


Publication details

All authors or editorsSalonen, Pasi; Schachner, Jörg A.; Peuronen, Anssi; Lahtinen, Manu; Belaj, Ferdinand; Mösch-Zanetti, Nadia C.; Lehtonen, Ari

Journal or seriesMolecular Catalysis

ISSN2468-8274

eISSN2468-8231

Publication year2023

Publication date08/03/2023

Volume540

Article number113034

PublisherElsevier

Publication countryNetherlands

Publication languageEnglish

DOIhttps://doi.org/10.1016/j.mcat.2023.113034

Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/86093


Abstract

The use of dioxidomolybdenum(vi) and -tungsten(vi) complexes supported by a variety of structurally different tri- and tetradentate aminobisphenolato ligands as pre-catalysts in the epoxidation of alkenes is well established. However, under the widely used standard 1 mol-% catalyst loadings these types of complexes generally show modest activity only. Recently, amide functionalities in the ligand design of various aminomonophenolato MoO2 complexes have been shown to lead to heightened catalytic activity in alkene epoxidation. In this paper we show that similar ligand amide functionalization can lead to significant enhancement in the alkene epoxidation activity of aminobisphenolato MoO2 complexes. Although the W variants showed much lower performance in comparison, the epoxidation activity of the Mo congeners is generally ca. two orders of magnitude higher than previously reported for structurally related aminobisphenolato complexes. An interesting phenomenon dubbed as “dilution effect” was discovered, wherein pre-catalyst loadings as low as 0.01 mol-% may be realized without significantly reduced impact in activity. Moreover, the [pre-catalyst]:[oxidant] molar ratio – an often overlooked reaction parameter in the literature – was found to be critical for optimal catalytic performance.


Keywordsalkenesoxidation (active)catalystscoordination complexesmolybdenumtungsten

Free keywordsaminobisphenolato ligands; dioxidomolybdenum(VI); dioxidotungsten(VI); alkene epoxidation


Contributing organizations


Ministry reportingYes

Reporting Year2023

Preliminary JUFO rating1


Last updated on 2024-03-04 at 18:46