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Fermi resonance in substitutedZ-3-methylene phthalides

Fermi-Resonanz in substituiertenZ-3-Methylenphthaliden

  • Anorganische Und Physikalische Chemie
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Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Summary

The absorption bands of the C=O Stretching vibrations of a series of thirty-nine substitutedZ-3-methylene phthalides (1a-s, 2a-h, 3a-f, 4a-c, and5a-c) were measured in CHCl3 and CCl4. The two-levelFermi resonance effect on the infrared spectra of the above compounds was investigated after deconvolution and band separation. The wave numbers of the unperturbed fundamental C=O stretching vibrations exhibit excellent linear correlations withHammet's constants of substituents and13C NMR chemical shifts of the C=O group.

Zusammenfassung

Die Absorptionsbanden der C=O-Streckschwingung von 39 substituiertenZ-3-Methylenphthaliden (1a-s, 2a-h, 3a-f, 4a-c und5a-c) wurden in CHCl3 und CCl4 vermessen. Durch Dekonvolution und Bandentrennung konnte der EinflußFermi-Resonanz auf die Infrarotspektren der obengenannten Verbindungen untersucht werden. Die Wellenzahlen der ungestörten C=O-Streckschwingungen ergeben ausgezeichnete lineare Korrelationen mit denHammetschen Substituentenkonstanten und den13C-NMR-Verschiebungen der Carbonylgruppe.

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Authors and Affiliations

  1. Department of Organic Chemistry and Institute of Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215, Bratislava, Slovak Republic

    A. Perjéssy, Z. Šusteková & P. Hrnčiar

  2. Department of Organic Chemistry, Faculty of Natural Sciences, P. J. Šafárik University, SK-04167, Košice, Slovak Republic

    O. Hritzová

  3. Department of Biological and Chemical Sciences, University of Essex, CO4 3SQ, Colchester, United Kingdom

    K. Bowden

Authors
  1. A. Perjéssy
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  2. O. Hritzová
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  3. Z. Šusteková
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  4. P. Hrnčiar
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  5. K. Bowden
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Perjéssy, A., Hritzová, O., Šusteková, Z. et al. Fermi resonance in substitutedZ-3-methylene phthalides. Monatsh Chem 128, 235–244 (1997). https://doi.org/10.1007/BF00807889

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  • DOI: https://doi.org/10.1007/BF00807889

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