Article,

Non linear adjustments with external conditions

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Journal of Mathematical Chemistry, 50 (3): 577-587 (March 2012)
DOI: 10.1007/s10910-011-9819-2

Abstract

A new non linear adjustment algorithm is proposed that includes the possibility to satisfy conditions involving non linear analytical functions of the adjustment parameters. It is based on the Levenberg-Marquardt algorithm and makes use of Lagrange multipliers to fulfill external conditions. As an application, the method is used to derive a modified Morse potential to represent the potential energy function of the 2 Π 1/2 ground state of nitric oxide (NO), while having both an acceptable description of the equilibrium bond length, the vibrational overtone spectrum to up to the 6th overtone, the energy and the dispersion coefficient at dissociation NO → N + O.

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