Superhalogen and Superacid.

A superhalogen F@C20(CN)20 and a corresponding Brønsted superacid were designed and investigated on DFT and DLPNO‐CCSD(T) levels of theory. Calculated compounds have outstanding electron affinity and deprotonation energy, respectively. We consider superacid H[F@C20(CN)20] to be able to protonate molecular nitrogen. The stability of these structures is discussed, while some of the previous predictions concerning neutral Brønsted superacids of record strength are doubted. © 2019 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR]