Gas phase infrared spectroscopy in characterization of unsaturated natural products

Athula B. Attygalle

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Characteristic absorptions which occur at 3028-3011 and 970-967 cm−1 in gas-phase Fourier-transform infrared spectra (FTIR) allow unambiguous determination of the configuration of the double bonds in long-chain unsaturated compounds bearing a RCH=CHR’ type of bond. The intensities of these two bands indicate the number of cis or trans bonds present in linear polyunsaturated compounds. Terminal vinyl groups can be identified, even when other functional groups are present, by the presence of 3085 and 914 cm−1absorptions. Compounds bearing (E,Z) or (Z,E) conjugated moieties show a characteristic “fingerprint” consisting of two bands at 978–977 and 948–946 cm.−1.

Original languageEnglish
Pages (from-to)2323-2326
Number of pages4
JournalPure and Applied Chemistry
Volume66
Issue number10-11
DOIs
StatePublished - 1 Jan 1994

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