Spruce (Picea mariana) and birch (Betula verrucosa) milled wood lignins were depolymerized with dry hydrogen iodide. 13C NMR spectra of the initial and treated lignins were recorded. The data on chemical shifts of a set of model compounds treated with dry HI were used in the assignment of changes in the spectra of the lignins. The results obtained show that a cleavage of ether bonds in lignin and a substitution of ct-hydroxy-and e-alkoxygroups by iodine take place during the treatment.
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