Summary
The IR spectra of a number of compounds formed in the ethanolysis of the lignin of foliate and coniferous species have been studied using samples of ethanol lignin, vanillin, syringic aldehyde, p-hydroxybenzaldehyde, guaiacylacetone, coniferyl and sinapic aldehydes, vanilloyl methyl ketone, α-hydroxypropiovanillone, α-ethoxypropiosyringone, and vanillic and gallic acids. Differences in the absorption at 1330–1340 cm−1 have been found in the spectra of samples of ethanol lignin from oak and pine. Oak lignin has a strong maximum which is absent in pine lignin. Thus, the lignins of foliate and confierous species can be distinguished by the absorption in the spectral region from 1330 to 1340 cm−1.
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Khimiya Prirodnykh Soedinenii, Vol. 3, No. 2, pp. 208–213, 1967
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Skurikhin, I.M. Study of the IR spectra of the products of the ethanolysis of oak and pine lignins. Chem Nat Compd 3, 172–175 (1967). https://doi.org/10.1007/BF00567994
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DOI: https://doi.org/10.1007/BF00567994