Alexander Antonov

@alexanderantonov.bsky.social

Organometallic chemist in love with non-covalent interactions. Researcher at Regensburg University He/Him #chemistry #maingroupchemistry #organometallic #lithium https://antonovlab.org/

@gdch.de Chemiedozententagung 2026 was exceptionally good. I am very happy to share our research activities. And Bulbasaur helped me a lot during presentation, serving as example of the synergy of two features (types). It was nice to meet old friends and make new ones.

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Today at the age of 86 my PhD supervisor Prof. Dr. Alexander Pozharskii passed away. Rest in peace dear friend, thank you for everything, your work will not be forgotten, and your legacy will live on forever in your students, and in the students of your students.

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Check our new paper in @pubs.acs.org Inorganic Chemistry on how hydrogen bonding facilitates chalcogen exchange between arsine oxides and phosphine selenides. pubs.acs.org/doi/10.1021/... in Memoriam Prof. Dr. Lina M. Epstein (A.N.Nesmeyanov Institute of Organoelement Compounds RAS)

Hydrogen-Bond-Assisted Chalcogen Transfer between Phosphine Selenides and Arsine Oxides

The Brønsted acid catalysis is widely regarded as one of the most effective methods for activating inert substrates and enabling unique reactivity. In this work, we introduce the first example of H-bond-assisted chalcogen exchange between arsine oxides and phosphine selenides under mild conditions, providing a powerful approach to the synthesis of arsine selenides. The reaction proceeds successfully in both protic and aprotic solvents and is accelerated by the presence of any nonaqueous acid. This newly discovered reaction is tested for various arsine oxides R3AsO (R = Ph, Et, nBu, iPr) and phosphine selenides R3PSe (R = Ph, Me, Et, tBu) and overall demonstrates high conversion, although the use of reagents with bulky substituents significantly hinders its efficiency. The reaction mechanism involves the formation of a four-membered cyclic transition state, which requires overcoming steric and electrostatic repulsion, as well as significant distortion of the reagents’ tetrahedral geometry. Hydrogen bonding with the As═O fragment helps to reduce electrostatic repulsion between the P═Se and As═O groups, making the formation of the cyclic intermediate more favorable.

pubs.acs.org

Can't wait to attend this wonderful meeting of organometallic chemists! Have you already registered? If not, it is time to be an early bird!

EUCOMC2025@eucomc2025.bsky.social · 2y ago

The EUCOMCXXVI will be held in the beautiful city of Bern Switzerland in July 6 - 10, 2025. We look forward to welcome you all! Follow this #bluesky account for updates and to find out a bit more about our exciting line up of speakers #SCS #euchems @unibern.bsky.social eucomc2025.scg.ch