Advertisement

Chemistry of Natural Compounds

, Volume 2, Issue 6, pp 351–356 | Cite as

The question of the chemical structure of amber

  • I. A. Alekseeva
  • L. A. Samarina
Article

Summary

1. The identity of the IR spectra of the main types of amber (transparent, semitransparent, opaque and bone ambers) in the 700–2000 cm−1 region has been confirmed. At the same time, differences between them have been shown by elemental analysis.

2. In order to isolate the fraction of amber soluble in alcohol, extraction with boiling alcohol instead of by prolonged extraction at room temperature has been proposed.

3. The amber fraction soluble in alcohol and petroleum ether can be separated into acid and ester (lactone) fractions by successive treatment of its ethereal solution with 1% and 15% aqueous alkalis.

4. The acid fraction isolated from the alcohol-soluble and the petroleum ether-insoluble fractions of amber have similar IR spectra but differ in elemental composition.

5. Succinin contains lactone (or ester) groupings whose hydrolysis forms hydroxyacids.

Keywords

Petroleum Ether Lactone Succinic Acid Strong Absorption Band Resin Acid 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. Tschirch, Helv. Chim. Acta,6, 214, 1923.CrossRefGoogle Scholar
  2. 2.
    L. Schmid and A. Erdös, Lieb. Ann. Chem.,503, 269, 1933.CrossRefGoogle Scholar
  3. 3.
    L. Schmid and W. Hosse, C.,2, 1388, 1939.Google Scholar
  4. 4.
    L. Schmid, C.,2, 2284, 1939.Google Scholar
  5. 5.
    D. Hummel, Kunstsroff-Lack-und Gummi-Analyse. Chemische und Infrarotspectroskopische Methoden, München, Hanser, 1958.Google Scholar
  6. 6.
    S. S. Savkevich and I. A. Shaks, ZhPKh,37, 930, 1964.Google Scholar
  7. 7.
    C. Beck, E. Wilbur, and S. Meret, Nature,201, 256, 1964.CrossRefGoogle Scholar
  8. 8.
    A. I. Aleksandrov, Zapiski Vsesoyuznogo mineralogicheskogo obshchestva, vol. 78, no. 2, 127, 1949.Google Scholar
  9. 9.
    A. M. Prima et al, ZhFKh,36, 62, 1962.Google Scholar
  10. 10.
    S. S. Savkevich and I. A. Shaks, ZhPKh,37, 2755, 1964.Google Scholar
  11. 11.
    L. Bellamy, Infrared Spectra of Complex Molecules [Russian translation], Moscow, 257, 250, 190, 1963.Google Scholar
  12. 12.
    W. W. West (ed.), Chemical Applications of Spectroscopy [Russian translation], Moscow, 365, 366, 1959.Google Scholar
  13. 13.
    V. N. Kuznetsov (ed.), Handbook of Chemical Reagents and Preparations [in Russian], Moscow and Leningrad, 580, 1953.Google Scholar
  14. 14.
    I. N. Sanchir (ed.), Handbook “Paint and Varnish Materials” (Raw Materials and Intermediates) [in Russian], Moscow, 216, 1961.Google Scholar
  15. 15.
    E. Vainshtein, Nauka i zhizn,10, 32, 1964.Google Scholar

Copyright information

© The Faraday Press, Inc. 1968

Authors and Affiliations

  • I. A. Alekseeva
    • 1
  • L. A. Samarina
    • 1
  1. 1.Institute of Chemistry, Urals Branch AS USSRUSSR

Personalised recommendations