Silicon tris(perchloro)dioxolene

• Verfasst von: Maskey, Rezisha [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Greb, Lutz [VerfasserIn]
• Titel: Silicon tris(perchloro)dioxolene
• Titelzusatz: a neutral triplet diradical
• Verf.angabe: Rezisha Maskey, Hubert Wadepohl, and Lutz Greb
• Jahr: 2019
• Jahr des Originals: 2018
• Umfang: 4 S.
• Fussnoten: First published: 10 December 2018 ; Gesehen am 27.05.2019
• Titel Quelle: Enthalten in: Angewandte Chemie / International edition
• Ort Quelle: Weinheim : Wiley-VCH, 1962
• Jahr Quelle: 2019
• Band/Heft Quelle: 58(2019), 11, Seite 3616-3619
• ISSN Quelle: 1521-3773
• DOI: doi:10.1002/anie.201812989
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: catechols
• Sach-SW: diradicals
• Sach-SW: hypercoordination
• Sach-SW: redox-active substituents
• Sach-SW: silanes
• K10plus-PPN: 1666339717

Abstract

The reaction of ortho-quinones with silicon tetraiodide leads to neutral silicon trisdioxolenes in high yield, delivering the unknown oxidized form of triscatecholatosilicate dianions and the first example of open-shell semiquinonates connected via a single non-metal center. Silicon tris(perchloro)dioxolene is a stable diradical with a triplet ground state, as supported by X-ray diffraction; IR, resonance Raman, UV/Vis, and (VT)EPR spectroscopy; and Kohn-Sham broken-symmetry computations. Preliminary results suggest that the preferred magnetic ground state can be altered through variation of the substituents.