Xylose triacetate

The anomeric effect also influences the conformational equilibria in pyranoses with an electronegative atom, usually oxygen or halogen, at C-1. For example, the equilibrium mixture of the P-pyranosyl chloride derived from xylose triacetate contains 98% of the conformer in which chlorine is axial. These two conformations are not interconverted by mutarotation but by chair-chair interconversion. The anomeric effect is sufficiently large so that all four substituents occupy axial positions in the more stable conformer. 

All unfractionated cellulose triacetate samples and high molecular weight fractions showed a shoulder on the high molecular weight side of the GPC distribution. Material Isolated from this region was found to be highly enriched in mannose and xylose, attributed to the presence of a hemicellu-lose derivative. Cellulose triacetate from cotton linters did not show this behavior. 

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