Gold Difluorocarbenoid Complexes: Spectroscopic and Chemical Profiling.

Autor: Tskhovrebov AG; Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany., Lingnau JB; Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany., Fürstner A; Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2019 Jun 24; Vol. 58 (26), pp. 8834-8838. Date of Electronic Publication: 2019 May 16.
DOI: 10.1002/anie.201903957
Abstrakt: Gold carbenes of the general type [LAu=CR 2 ] + are sufficiently long-lived for spectroscopic inspection only if the substituents compensate for the largely missing stabilization of the carbene center by the [LAu] + fragment. π-Donation by two fluorine substituents (R=F) is insufficient; rather, difluorocarbene complexes are so deprived in electron density that they sequester even "weakly coordinating" anions such as triflate or triflimide. This particular bonding situation translates into unmistakable carbenium ion chemistry upon reaction with stilbene as a model substrate.
(© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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