The relative configurations of the stereoisomers of tartaric acid were established by the following syntheses:(1) d@(+)@glyceraldehyde T diastereomers A and B (separated)(2) Hydrolysis of A and B using aqueous Ba(OH)2 gave C and D, respectively.(3) HNO3 oxidation of C and D gave (-)@tartaric acid and meso-tartaric acid, respectively.(a) You know the absolute configuration of d-(+)-glyceraldehyde. Use Fischer projections to show the absolute configurations of products A, B, C, and D.(b) Show the absolute configurations of the three stereoisomers of tartaric acid: (+)-tartaric acid, (-)-tartaric acid, andmeso-tartaric acid.

Question

The relative configurations of the stereoisomers of tartaric acid were established by the following syntheses:
(1) d@(+)@glyceraldehyde T diastereomers A and B (separated)
(2) Hydrolysis of A and B using aqueous Ba(OH)2 gave C and D, respectively.
(3) HNO3 oxidation of C and D gave (-)@tartaric acid and meso-tartaric acid, respectively.
(a) You know the absolute configuration of d-(+)-glyceraldehyde. Use Fischer projections to show the absolute configurations of products A, B, C, and D.
(b) Show the absolute configurations of the three stereoisomers of tartaric acid: (+)-tartaric acid, (-)-tartaric acid, and
meso-tartaric acid.

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