Renner-Teller effects in HCO+ dissociative recombination
  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. 
Ivan A. Mikhaylov (1), Viatcheslav Kokoouline (2), Asa Larson (2),   Stefano Tonzani (3), Chris H. Greene (3) ((1) Departmen...