A program has been developed in order to fit analytical power series expansions (Dunham, Simon-Parr-Finlan, Ogilvie and their exponential variants) and PadΓ© approximants to discrete ab initio potential energy surfaces of non-linear triatomic molecules. The program employs standard least-squares fitt
A spline-fitted potential surface for bent triatomic molecules
β Scribed by Stephen K. Gray; James S. Wright; Xavier Chapuisat
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 294 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The rotated-Morse curve cubic spliie method developed previously is extended to bent triatomic molecules by usinS 25 cubic splmes. The Yates-Lester potential for bent Hs is shown to be accurately fitted over the entire raqe of the three internal coordinates, with a standard deviation of less than 1 kcal mol-' . The spline method compares favorably in computational speed with the analytical potentiaL
π SIMILAR VOLUMES
A coordinate representation for a polenlial energy surface is derived usmg the semiclassical hmil of the algebrax Hamihonian This provides a direct route rrom the observed ovenone spectrum IO a potential. The limilalions of this potenual are noted. Applicallons lo HCN. H,O. SO2 and 0, are reported.
The Wall-Porter method of rotating a hlorse function to construct poiential energy surfaces for colLnez~ atom-diatom chemical reactions is modified by using a numerical spline interpolation technique. This procedure is shown to have BP-at fk.uibility in giving a potential surface desired characteris
We report here an optimization of the parameters in an analytical representation of the potential energy function for the electronic ground state of the water molecule on the basis of experimental data. The calculations are carried out with the MORBID (Morse Oscillator Rigid Bender Internal Dynamics