From Proton to Boron: The Lewis Analogs of Protonated Brønsted Super Acids

Autor: Arnaud Osi, Nikolay Tumanov, Luca Fusaro, Johan Wouters, Guillaume Berionni, Aurélien Chardon
Rok vydání: 2023
Předmět:
Zdroj: Chemistry – A European Journal.
ISSN: 1521-3765
0947-6539
DOI: 10.1002/chem.202301146
Popis: Isolation and characterization of highly reactive intermediates are crucial to understand the nature of chemical reactivity. Accordingly, the reactivity of weakly coordinating anions (WCA), usually used to stabilized cationic super electrophiles are of fundamental interest. When a variety of WCA are known to form stable σ-complexes with a proton, inducing Brønsted super acidity, bis-coordinated weak-coordinated anions are much more elusive and considered as long-sought reactive species. In this work, the chemistry of borylated sulfate, triflimidate and triflate anions where scouted in details with the aim of synthetizing the unique analogs of protonated Brønsted superacids. Those complexes were formed by successive borylation with a 9-boratriptycene derived Lewis super acid paired with a weak coordinated anion, characterized in solution and in the solid state and exhibit unique structures and reactivities.
Databáze: OpenAIRE
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