  A theoretical description of the dissociative recombination process for the
HCO+ ion suggests that the nonadiabatic Renner-Teller coupling between
electronic and vibrational degrees of freedom plays an important role. This
finding is consistent with a recent study of this process for another
closed-shell molecule, the H3+ ion, where Jahn-Teller coupling was shown to
generate a relatively high rate. The cross section obtained here for the
dissociative recombination of HCO+exhibits encouraging agreement with a
merged-beam experiment.
