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Chemistry of Heterocyclic Compounds

, Volume 1, Issue 2, pp 160–161 | Cite as

Absorption spectra of some imidazolid-4-one derivatives, the dimerocyanines. IV. Effect of temperature on dye absorption spectrum in the visible region

  • Yu. Sh. Moshkovskii
  • T. N. Ignatovich
  • N. S. Spasokukotsii
  • M. V. Deichmeister
Article
  • 33 Downloads

Abstract

Observation at different temperatures of uv absorption spectra of a number of imidazolid-4-one derivatives, dimerocyanines, shows that change in temperature of the solution causes considerable alterations in the absorption curves. In agreement with previous results, this corresponds to a displacement of equilibrium between two dye conformations in solution. One conformation has theβ-dicarbonyl group more coplanar with respect to the plane of the molecule than the other. The transition energy required to convert one form into the other (ΔH) is found from a plot of the logarithms of the equilibrium constants against the reciprocal of the temperature. It is shown that ΔH depends on the substituent at the nitrogen atom in position 3 of the imidazolidone ring.

Keywords

Nitrogen Organic Chemistry Absorption Spectrum Nitrogen Atom Equilibrium Constant 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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    M. V. Deichmeister, N. S. Spasokukotskii, Yu. Sh. Moshkovskii, and L. D. Zhilina, ZhOKh, 31, 3631, 1961.Google Scholar
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    N. S. Spasokukotskii, Yu. Sh. Moshkovskii, M. V. Deichmeister, and L. D. Zhilina, ZhOKh, 34, 3259, 1964.Google Scholar
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    Yu. Sh. Moshkovskii, N. S. Spasokukotskii, and M. V. Deichmeister (in press).Google Scholar
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    S. Mizushima, Structure of Molecules and Internal Rotation [Russian translation], IL, Moscow, 1957.Google Scholar

Copyright information

© The Faraday Press, Inc. 1966

Authors and Affiliations

  • Yu. Sh. Moshkovskii
    • 1
    • 2
  • T. N. Ignatovich
    • 1
    • 2
  • N. S. Spasokukotsii
    • 1
    • 2
  • M. V. Deichmeister
    • 1
    • 2
  1. 1.Institute of Chemical Physics AS USSRMoscow
  2. 2.All-Union Cinephotographic Scientific Research InstituteMoscow

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