Attygalle, Athula B.’s team published research in Analytical Chemistry in 66 | CAS: 16974-11-1

Analytical Chemistry published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Formula: C14H26O2.

Attygalle, Athula B. published the artcileGas-Phase Infrared Spectroscopy for Determination of Double Bond Configuration of Monounsaturated Compounds, Formula: C14H26O2, the publication is Analytical Chemistry (1994), 66(10), 1696-703, database is CAplus and MEDLINE.

Gas-phase Fourier-transform IR spectra allow unambiguous determination of the configuration of the double bonds of long-chain unsaturated compounds bearing RCH:CHR’ type bonds. Although the IR absorption at 970-967 cm-1 has been used previously for the identification of trans bonds, the absorption at 3028-3011 cm-1 is conventionally considered to be incapable of distinguishing cis and trans isomers. In this paper, the authors present a large number of gas-phase spectra of monounsaturated long-chain acetates which demonstrate that an absorption, highly characteristic for the cis configuration, occurs at 3013-3011 cm-1, while trans compounds fail to show any bands in this region. However, if a double bond is present at the C-2 or C-3 carbon atoms, this cis :CH stretch absorption shows a hypsochromic shift to 3029-3028 and 3018-3017 cm-1, resp. Similarly, if a cis double bond is present at the penultimate carbon atom, this band appears at 3022-3021 cm-1. All the spectra of trans alkenyl acetates showed the expected C-H wag absorption at 968-964 cm-1. In addition, the spectra of (E)-2-alkenyl acetates show a unique three-peak “fingerprint” pattern which allows the identification of the position and configuration of this bond. Furthermore, by synthesizing and obtaining spectra of appropriate deuteriated compounds, the authors have proved that the 3013-3011 cm-1 band is representative of the C-H stretching vibration of cis compounds of RCH:CHR’ type.

Analytical Chemistry published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Formula: C14H26O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics