EPR Spectroscopic Study of the Active Species of Iron-Catalyzed Enantioselective Epoxidation - Conference attendances | Sciact - CRIS-system of Boreskov Institute of Catalysis

EPR Spectroscopic Study of the Active Species of Iron-Catalyzed Enantioselective Epoxidation Conference attendances

Language

Английский

Participant type

Стендовый

Conference

EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015 , Казань

Authors

Lyakin Oleg Yurʹevich ^1,2 , Zima Alexandra ^1,2 , Bryliakov Konstantin Petrovich ^1,2 , Talsi Evgeniy Pavlovich ^1,2

Affiliations

1	Boreskov Institute of Catalysis SB RAS
2	Novosibirsk National Research University

The extremely unstable iron-oxygen intermediates formed in bioinspired catalyst systems based on dinuclear ferric complexes with aminopyridine ligands containing electron-donating substituents, H2O2 and acetic acid have been detected by EPR spectroscopy for the first time. The detected intermediates are highly reactive and selective towards electron-rich alkene epoxidation even at −85 °C. They exhibit rhombic EPR spectra with the main values of g-tensor close to those of known oxoiron(V) complexes. On the basis of this similarity and reactivity data, we have assigned the observed intermediates to the oxoiron(V) [(L)FeV=O(OC(O)CH3)]2+ active species of selective alkene epoxidation by the catalyst systems studied herein.

Lyakin O.Y. , Zima A. , Bryliakov K.P. , Talsi E.P.
EPR Spectroscopic Study of the Active Species of Iron-Catalyzed Enantioselective Epoxidation
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015