Unexpected benzene oxidation in collisions with superoxide anions

Superoxide anions colliding with benzene molecules at impact energies from 200 to 900 eV are reported for the first time to form massive complexes. With the aid of quantum chemistry calculations, we propose a mechanism in which a sudden double ionization of benzene and the subsequent electrostatic attraction between the dication and the anion form a stable covalently bonded C6H6O2+ molecule, that evolves towards the formation of benzene-diol conformers. These findings lend support to a model presenting a new high energy anion-driven chemistry as an alternative way to form complex molecules.

Automated summary

The study reports the formation of massive complexes by the collision of superoxide anions with benzene molecules at impact energies from 200 to 900 eV. Through quantum chemistry calculations, a mechanism is proposed suggesting the stable formation of a covalently bonded C6H6O2+ molecule from a sudden double ionization of benzene. These findings support a new model of high-energy anion-driven chemistry as an alternative method to form complex molecules.