Donor Acceptor Complexes between the Chalcogen Fluorides SF2 , SeF2 , SeF4 and TeF4 and an N-Heterocyclic Carbene

Pascal Komorr; Marian Olaru; Emanuel Hupf; Stefan Mebs; Jens Beckmann

doi:10.1002/chem.202201023

Donor Acceptor Complexes between the Chalcogen Fluorides SF₂ , SeF₂ , SeF₄ and TeF₄ and an N-Heterocyclic Carbene

Chemistry. 2022 Aug 10;28(45):e202201023. doi: 10.1002/chem.202201023. Epub 2022 Jun 20.

Authors

Pascal Komorr¹, Marian Olaru¹, Emanuel Hupf¹, Stefan Mebs², Jens Beckmann¹

Affiliations

¹ Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany.
² Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany.

Abstract

The majority of binary chalcogen fluorides are fiercely reactive and extremely difficult to handle. Here, we show that access to crystalline donor-acceptor complexes between chalcogen difluorides (sulfur, selenium) and tetrafluorides (selenium, tellurium) with the N-heterocyclic carbene (NHC) 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) is possible conveniently and safely without the need to generate the highly unstable EF₂ (E=S, Se) or the very toxic and corrosive SeF₄ .

Keywords: N-heterocyclic carbine; fluorine; selenium; sulphur; tellurium.