First fluoronium crystal solves structure controversy
X-ray analysis of elusive cation finally proves it to be a symmetric near-covalent structure, not a carbocation
The first fluoronium [C–F–C]+ crystal ever grown has finally proven that it is a symmetrical structure – not a carbocation like some earlier research had suggested. Despite being the most electronegative element in the periodic table, fluorine engages in two almost covalent bonds with its neighbouring carbon atoms.