Nonadiabatic effects in HD+

For HD+ a potential, that allows for the nonadiabatic effects due to its mass asymmetry, is used to study the remaining nonadiabatic effects, those common to HD+ and the homonuclear H2+ and D2+. The analysis is in terms of effective vibrational and rotational reduced masses, together with a potential scaling factor. Isotope-independent parameters are determined.