Structural proof of a [C-F-C]⁺ fluoronium cation.

ABSTRACT: Organic fluoronium ions can be described as positively charged molecules in which the most electronegative and least polarizable element fluorine engages in two partially covalent bonding interactions to two carbon centers. While recent solvolysis experiments and NMR spectroscopic studies on a metastable [C-F-C]⁺ fluoronium ion strongly support the divalent fluoronium structure over the alternative rapidly equilibrating classical carbocation, the model system has, to date, eluded crystallographic analysis to confirm this phenomenon in the solid state. Herein, we report the single crystal structure of a symmetrical [C-F-C]⁺ fluoronium cation. Besides its synthesis and crystallographic characterization as the [Sb₂F₁₁]^- salt, vibrational

SUBMITTER: Hoffmann KF 

PROVIDER: S-EPMC8421340 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature