The molecular and electronic structures of a thioaroyl cation formed by borinium ion-mediated C=S double bond cleavage of CS2.

The first crystallographic and electron density distribution analyses of a thioaroyl cation unveil its true structural perspective; this chemical species can be mainly expressed as the combination of the thioketene form (II) and sulfonium form (III) with a C≡S(+) triple bond character.