Coupling of CO2 and epoxides catalysed by novel N-fused mesoionic carbene complexes of nickel(II)

Fabian A. Watt; Benedikt Sieland; Nicole Dickmann; Roland Schoch; Regine Herbst-Irmer; Holger Ott; Jan Paradies; Dirk Kuckling; Stephan Hohloch

doi:10.1039/D1DT03311E

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Coupling of CO₂ and epoxides catalysed by novel N-fused mesoionic carbene complexes of nickel(ii)†

Fabian A. Watt,‡^a Benedikt Sieland,‡^a Nicole Dickmann,‡^a Roland Schoch,^a Regine Herbst-Irmer,

^b Holger Ott,

^c Jan Paradies,

^a Dirk Kuckling^a and Stephan Hohloch

*^d

Author affiliations

* Corresponding authors

^a Paderborn University, Faculty of Science, Department of Chemistry, Warburger Straße 100, 33098 Paderborn, Germany

^b University of Göttingen, Institute of Inorganic Chemistry, Tammannstraße 4, 37077 Göttingen, Germany

^c Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany

^d University of Innsbruck, Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria
E-mail: Stephan.Hohloch@uibk.ac.at

Abstract

We report the syntheses of two rigid mesoionic carbene (MIC) ligands with a carbazole backbone via an intramolecular Finkelstein–cyclisation cascade and investigate their coordination behavior towards nickel(II) acetate. Despite the nickel(II) carbene complexes 4a,b showing only minor differences in their chemical composition, they display curious differences in their chemical properties, e.g. solubility. Furthermore, the potential of these novel MIC complexes in the coupling of carbon dioxide and epoxides as well as the differences in reactivity compared to classical NHC-derived complexes are evaluated.

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DOI: https://doi.org/10.1039/D1DT03311E
Article type: Paper
Submitted: 29 Sep 2021
Accepted: 27 Oct 2021
First published: 27 Oct 2021
This article is Open Access

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Dalton Trans., 2021,50, 17361-17371

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Coupling of CO₂ and epoxides catalysed by novel N-fused mesoionic carbene complexes of nickel(II)

F. A. Watt, B. Sieland, N. Dickmann, R. Schoch, R. Herbst-Irmer, H. Ott, J. Paradies, D. Kuckling and S. Hohloch, Dalton Trans., 2021, 50, 17361 DOI: 10.1039/D1DT03311E

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