Aldaric acids properties

Several aspects of this research are particularly exciting. The condensation polymerization method allows for preparation of a broad spectrum of polymers with different primary structures based simply on using different diacid and diamine monomers. As a result, by choice of the acid and diamine monomers, one can alter, in somewhat predictive fashion, such polymer properties as melting point, solvent solubility, crystallinity, film and adhesive characteristics and undoubtedly other polymer properties that remain to be studied. Furthermore, the condensations require no aldaric acid hydroxyl group protection/deprotection, a very important cost consideration in the potential production of any of these materials. 

Morton D.W., IQely D.E., Evaluation of the film and adhesive properties of some block copolymerpolyhydroxypolya-mides from esterifled aldaric acids and diamines, J. Appl. Polym. Sci, 77, 2000, 3085-3092. 

In Summary Step-by-step one-carbon chain lengthening or shortening, in conjunction with the symmetry properties of the various aldaric acids, allows the stereochemical assignments of the aldoses. 

The Fischer proof uses the techniques of chain lengthening and shortening together with the symmetry properties of aldaric acids to determine the structures of the alsoses. 

We recall dilute nitric acid oxidizes aldoses to aldaric acids. The symmetry properties of the aldaric acid provide information about the possible configurations of the secondary hydroxyl groups. If the aldonic acid formed by oxidation is optically inactive, the hydroxyl groups occur in a symmetrical arrangement. For example, D-galactose gives an optically inactive aldaric acid... 

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