Comment on `Potential energy surfaces of excited states of H2−ʹ (Chem. Phys. Lett. 285 (1998) 114–120)

The H2− excited state potential curves of Mebel et al. (Chem. Phys. Lett. 285 (1998) 114–120) are re-analysed. They are shown to be artefacts of the method of computation, with little or no relation to real states. The need for caution in the use of bound state electronic structure methods to study resonance parameters is re-emphasized.