13C NMR and IR analyses of structure,aging and botanical origin of Dominican and Mexican ambers |
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| Authors: | Alan Cunningham Ian D Gay AC Oehlschlager Jean H Langenheim |
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| Institution: | 1. Division of Natural Sciences, University of California, Santa Cruz, CA 95064, U.S.A.;1. Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada, V5A 1S6 |
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| Abstract: | 13C NMR analysis of Oligocene amber from the Dominican Republic, Oligo-Miocene amber from Mexico and trunk resins from certain extant species of Hymenaea, suggests a polylabdane structure for all and gives insights into structural changes during aging. Additionally, IR spectra, some aspects of the 13C NMR spectra and paleobotanical data suggest a close relationship between Dominican amber and H. verrucosa. By contrast, spectral evidence shows that Mexican amber differs, not only from the former polymers, but from the H. courbaril polymer. |
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| Keywords: | tropical Leguminosae Dominican Republic amber Mexican amber resin resin polymer sesquiterpene hydrocarbons IR labdane |
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