[en] The reaction of N₂⁺ (X,v = o) with H₂ is interesting in that the product N₂H⁺ rather than H₂⁺ appears, though the charge transfer to give H₂⁺ (X,v = o) is exoergic by 0.15 eV and a favorable Franck-Condon Factor exists for the H₂ (X,v = o) → H₂⁺ (X,v = o) transition (FCF approximately 0.087). Usually charge transfer takes over, when it competes with other reaction mechanisms. However an exception is the charge transfer between Ar⁺ and N₂, where the exoergic channel into N₂⁺ (X,v = o) does not appear at an appreciable rate at thermal and suprathermal energies. The inhibition of this exoergic transfer seems to occur due to nonexistent crossings between the Arsup+ - N₂ and N₂⁺ (X,v = o) - Ar potential curves. The same situation may in the case of the N₂⁺ (X,v = o) reaction with H₂ inhibit charge transfer, so that heavy particle transfer (hydrogen abstraction) occurs instead. For N₂⁺ (X,v = 1) however a favorable curve crossing seems to allow for a fast charge transfer. (Author)