Strong Lewis and Brønsted acidic sites in the borosulfate Mg3[H2O→B(SO4)3]2

Abstract: Borosulfates provide fascinating structures and properties that go beyond a pure analogy to silicates. Mg3[H2O→B(SO4)3]2 is the first borosulfate featuring a boron atom solely coordinated by three tetrahedra. Thus, the free Lewis acidic site forms a Lewis acid–base adduct with a water molecule. This is unprecedented for borosulfate chemistry and even for borates. Quantum chemical calculations on water exchange reactions with BF3 and B(C6F5)3 revealed a higher Lewis acidity for the borosulfate anion. Moreover, proton exchange reactions showed a higher Brønsted acidity than comparable silicates or phosphates. Additionally, Mg3[H2O→B(SO4)3]2 was characterised by X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and density functional theory (DFT) calculations

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Notes
Angewandte Chemie. International edition. - 60, 19 (2021) , 10643-10646, ISSN: 1521-3773

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2021
Creator

DOI
10.1002/anie.202016920
URN
urn:nbn:de:bsz:25-freidok-2225425
Rights
Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
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15.08.2025, 7:27 AM CEST

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Time of origin

  • 2021

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