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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 50, Iss. 12 — Dec. 1, 1960
  • pp: 1267–1268

Note on the Determination of the Potential Functions of Polyatomic Molecules

DAVID M. DENNISON  »View Author Affiliations


JOSA, Vol. 50, Issue 12, pp. 1267-1268 (1960)
http://dx.doi.org/10.1364/JOSA.50.001267


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Abstract

It is shown that first-order changes in the normal modes of vibration of a polyatomic molecule do not alter the normal frequencies except in second or higher order. This fact provides a convenient method of obtaining the best fit between the observed and calculated frequencies by adjusting the potential constants and also of ascertaining the relative importance of each constant in its effect on the spectrum. It further emphasizes, however, the well-known difficulties in obtaining reliable potential functions and shows that very considerable errors may occur in the determination of the potential and of the normal modes.

Citation
DAVID M. DENNISON, "Note on the Determination of the Potential Functions of Polyatomic Molecules," J. Opt. Soc. Am. 50, 1267-1268 (1960)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-50-12-1267


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References

  1. For example, see E. B. Wilson, Jr., J. C. Decius, and P. C. Cross, Molecular Vibrations (McGraw-Hill Book Company, Inc., New York, 1955), p. 231. See also Tsu-shen Chang, thesis, University of Michigan, 1954, for an application of the method in the determination of the potential functions of the methyl halide molecules.

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