ASPECTS OF PARTIALLY ACETYLATED DEGRADED AMYLOPECTINS - A C-13 NMR-STUDY

C-13 NMR signal assignments were achieved for amylose and amylopectin triacetates and a series of partially acetylated, acid degraded amylop ectin derivatives. Using the relative intensities of several of these signals for the latter materials the following could be deduced. First , within the molar substitution range of 0.47 and 0.72 the acetylation of partially degraded amylopectins takes place randomly distributed a t all glucan moieties of the polysaccharide. Second, the probabilities of substitutions of hydroxyl groups in positions 2, 3, and 6 of a dis crete glucan moiety are equivalent.