The Structure and Conformation of Lignin as Judged by X-ray Crystallographic Investigations of Lignin Model Compounds: Arylglycerol β-Syringyl Ethers
Paper in proceedings, 2008

Structural elements of the arylglycerol β-syringyl ether type are very frequent in hardwood lignins. A variety of crystalline dimeric lignin models representing different diastereomeric forms of structural elements in lignin of this type have been studied using X-ray crystallography. Bond distances and bond angles in the model compounds are in all probability nearly identical with those of the corresponding structural elements in lignins. Based on X-ray crystallographic data from four compounds a sequence of units (5 aromatic rings, 8 chiral Catoms) attached to each other by β-syringyl ether linkages was constructed. The appearance of the resulting oligomer illustrates that stereoisomerism can be expected to influence the shape of the lignin molecules to a great extent. The constructed oligomer constitutes one of 256 possible stereoisomers (128 racemates).

Author

Knut Lundquist

Chalmers, Chemical and Biological Engineering, Forest Products and Chemical Engineering

Vratislav Langer

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Proceedings of the10th EUROPEAN WORKSHOP ON LIGNOCELLULOSICS AND PULP, EWLP 2008; KTH Royal institute of Technology, Stockholm, Sweden 25-28 August 2008

308-311

Subject Categories

Wood Science

Organic Chemistry

More information

Created

10/6/2017