II. Calculation of Energy of H3+ Ion

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Abstract
The potential energies for linear symmetrical configurations of H3 + have been calculated by the same methods used in the previous paper (I). The energies at the minimum in kcal./mole and the corresponding distances between neighboring atoms in Bohr radii for the various approximations are: Heitler−London −91.92 at 2.00; H.L. plus polar −108.64 at 2.00; Wang Approx . −130.89 at 1.55; Wang plus polar −155.35 at 1.52. It follows from the use of the variational method that the energy of binding of a proton to H2 is greater than 46.8 kcal./mole. If we use the same Wang plus polar approximation for H2 and H3 + we obtain for this binding energy 63.11 kcal./mole. The reaction H2 ++H2→H3 ++H may be exothermal and cannot be more than slightly endothermal.

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