Crystal structure of phenanthrenide salts stabilized by 15-crown-5 and 18-crown-6-Reference-Cited by-同舟云学术

Crystal structure of phenanthrenide salts stabilized by 15-crown-5 and 18-crown-6

Published:2021-12-30 Issue:0 Volume:0 Page:
ISSN:0932-0776
Container-title:Zeitschrift für Naturforschung B
language:en
Short-container-title:

Author:

Eichstaedt Natalie¹,van der Zwan Kasper P.²,Mayr Lina¹,Siegel Renée²,Senker Jürgen²,Breu Josef¹

Affiliation:

1. Department of Inorganic Chemistry I , University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth , Germany

2. Department of Inorganic Chemistry III and Northern Bavarian NMR Center , University of Bayreuth , Bayreuth , Germany

Abstract

Abstract Potassium 15-crown-5 phenanthrenide and potassium 18-crown-6 phenanthrenide were synthesized and characterized by powder X-ray diffraction and 39K solid state NMR spectroscopy. While the radical carbanion is very reactive in solution, the crystals are stable and storable under inert atmosphere. For 15-crown-5, a sandwich-like complex of potassium is formed with two molecules of crown ether per potassium resulting in a coordination number of 10. For the larger 18-crown-6 ligand, a 1:1 complex is obtained and a coordination number of 6 for the potassium cation. In neither crystal structure solvent molecules are incorporated. The 15-crown-5 compound crystallizes faster and is less soluble in THF as compared to the 18-crown-6 compound. Both compounds form solid phenanthrenide that is easy to handle and can be applied for reduction reactions.

Publisher

Walter de Gruyter GmbH

Subject

General Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/znb-2021-0177/pdf

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