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HSQC Data from a mixture of the three dehydrodiconiferyl alcohol dimers prepared from coniferyl alcohol. These are the β-aryl ether (or simply β-ether, β-O-4), phenylcoumaran (β-5), and resinol (β-β) units. Twelve HSQC plots illustrating the side-chain unit contours with their characteristic linkages in the three solvents were prepared. The same mixture was derivatized to model the dimers as phenolic methyl ethers, as the fully acetylated compounds, and finally as the acetates of the phenolic methyl ethers. The 12 plots provide a quick visual affirmation and chemical shift data for identification of these linkages in both native and technical lignins, and make it easy to see the changes in chemical shift due to derivatization.
Coniferyl Alcohol 3-Dimer Mix Sidechain HSQC compilation