A1 Journal article (refereed)
Approaching a “Naked” Boryl Anion : Amide Metathesis as a Route to Calcium, Strontium, and Potassium Boryl Complexes (2021)

Protchenko, A. V., Vasko, P., Fuentes, M. Á., Hicks, J., Vidovic, D., & Aldridge, S. (2021). Approaching a “Naked” Boryl Anion : Amide Metathesis as a Route to Calcium, Strontium, and Potassium Boryl Complexes. Angewandte Chemie, 60(4), 2064-2068. https://doi.org/10.1002/anie.202011839

JYU authors or editors

Vasko, Petra

Publication details

All authors or editors: Protchenko, Andrey V.; Vasko, Petra; Fuentes, M. Ángeles; Hicks, Jamie; Vidovic, Dragoslav; Aldridge, Simon

Journal or series: Angewandte Chemie

ISSN: 1433-7851

eISSN: 1521-3773

Publication year: 2021

Publication date: 23/11/2020

Volume: 60

Issue number: 4

Pages range: 2064-2068

Publisher: Wiley

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1002/anie.202011839

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/73254

Abstract

Amide metathesis has been used to generate the first structurally characterized boryl complexes of calcium and strontium, {(Me3Si)2N}M{B(NDippCH)2}(thf)n (M=Ca, n=2; M=Sr, n=3), through the reactions of the corresponding bis(amides), M{N(SiMe3)2}2(thf)2, with (thf)2Li‐ {B(NDippCH)2}. Most notably, this approach can also be applied to the analogous potassium amide K{N(SiMe3)2}, leading to the formation of the solvent‐free borylpotassium dimer [K{B(NDippCH)2}]2, which is stable in the solid state at room temperature for extended periods (48 h). A dimeric structure has been determined crystallographically in which the K+ cations interact weakly with both the ipso‐carbons of the flanking Dipp groups and the boron centres of the diazaborolyl heterocycles, with K⋅⋅⋅B distances of >3.1 Å. These structural features, together with atoms in molecules (QTAIM) calculations imply that the boron‐containing fragment closely approaches a limiting description as a “free” boryl anion in the condensed phase.

Keywords: coordination complexes; boron; amides

Free keywords: atoms in molecules; boryl; s-block chemistry; structural studies

Fields of science: