Question: (a) Would you expect d-glucaric acid to be optically active? (b) Write the open-chain structure for the aldaric acid (mannaric acid) that would be obtained

(a) Would you expect d-glucaric acid to be optically active?
(b) Write the open-chain structure for the aldaric acid (mannaric acid) that would be obtained by nitric acid oxidation of d-mannose.
(c) Would you expect mannaric acid to be optically active?
(d) What aldaric acid would you expect to obtain from d-erythrose?

(e) Would the aldaric acid in (d) show optical activity?
(f) d-Threose, a diastereomer of d-erythrose, yields an optically active aldaric acid when it is subjected to nitric acid oxidation. Write Fischer projection formulas for d-threose and its nitric acid oxidation product.
(g) What are the names of the aldaric acids obtained from d-erythrose and d-threose?

CHO HOH OH CH2OH D-Erythrose

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