The narcissus constant, N = 2.3983843828..., is defined as a number that fulfills the narcissistic infinite nested radical equation
Incorporation of this constant, its square and its cube into the generalized version of the Lennard-Jones potential function gives the narcissus constant potential function
which (a) is suitable for modeling van der Waals interaction due to its agreement with the Lennard-Jones (12-6) potential energy curve over long range, and (b) forms simple generalized hybrid interatomic–intermolecular potential energy function due to its correlation with the averaged form of Lennard-Jones, Morse, Buckingham and Linnett potential energy curve near the minimum well-depth.
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Lim, TC. Potential energy function based on the narcissus constant, its square and its cube. J Math Chem 43, 304–313 (2008). https://doi.org/10.1007/s10910-006-9196-4
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DOI: https://doi.org/10.1007/s10910-006-9196-4