Tris(dimethylamino)silylium ion

• Verfasst von: Kramer, Nina [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Greb, Lutz [VerfasserIn]
• Titel: Tris(dimethylamino)silylium ion
• Titelzusatz: structure and reactivity of a dimeric silaguanidinium
• Verf.angabe: Nina Kramer, Hubert Wadepohl and Lutz Greb
• E-Jahr: 2019
• Jahr: 12 Jun 2019
• Umfang: 4 S.
• Fussnoten: Gesehen am 23.07.2019
• Titel Quelle: Enthalten in: Chemical communications
• Ort Quelle: Cambridge : Soc., 1965
• Jahr Quelle: 2019
• Band/Heft Quelle: 55(2019), 54, Seite 7764-7767
• ISSN Quelle: 1364-548X
• DOI: doi:10.1039/C9CC03625C
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1669616819

Abstract

Although several strategies for the stabilization of silylium ions have been established, “π-stabilization” with directly attached π-donor heteroatoms at silicon has not been developed yet. Hydride abstraction from (Me2N)3SiH generates dicationic [(Me2N)3Si+]2 in solution and in the solid state - constituting the dimer of an elusive silaguanidinium ion. This compound can be synthesized on a gram scale and is compatible with common organic solvents. However, it readily undergoes spontaneous electrophilic silylation of electron-rich aromatic compounds or initiates a catalytic hydro-defluorination reaction.