Asymptotics of the exchange splitting energy for a diatomic molecular ion from a volume integral formula of symmetry-adapted perturbation theory

Piotr Gniewek, Bogumił Jeziorski

The exchange splitting energy $J$ of the lowest \emph{gerade} and \emph{ungerade} states of the H${}_2^{+}$ molecular ion was calculated using a volume integral expression of symmetry-…