Conclusions
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1.
The surface areas of the potential energy for the reaction of forming ammonium ion were calculated employing the SCF MO LCAO method on an expanded STO-4GTO basis.
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2.
The optimum value of the length of the N−H bond in the ammonium ion was determined (1.965 at. units), and is in good agreement with experiment.
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3.
A value of 211.8 kcal/mole was obtained for the proton affinity of the ammonia molecule, which practically coincides with the experimental value.
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Additional information
Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR, A. A. Zhdanov Irkutsk State University. Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2367–2369, October, 1976.
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Dolgunicheva, O.Y., Vitkovskaya, N.M., Patovskii, G.V. et al. Nonempirical calculation of surface area of potential energy of ammonium ion. Russ Chem Bull 25, 2210–2212 (1976). https://doi.org/10.1007/BF02659555
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DOI: https://doi.org/10.1007/BF02659555