Concept explainers
(a)
Interpretation:
The Fisher projection for the aldaric acid and the structure of
Concept introduction:
Fischer projections is a two dimensional representation of organic compounds. It was proposed to represent glucose molecules. The carbon chain is represented vertically; the hydoxy groups and hydrogen atoms are represented horizontally, according to their stereochemistry.
(b)
Interpretation:
The Fisher projection for the aldaric acid and the structure of
Concept introduction:
Fischer projections is a two dimensional representation of organic compounds. It was proposed to represent glucose molecules. The carbon chain is represented vertically; the hydoxy groups and hydrogen atoms are represented horizontally, according to their stereochemistry.
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Organic Chemistry
- The anticoagulant heparin is a polysaccharide that contains alternating residues of -D- glucuronic acid-6- sulfate and N-sulfo-D-glucosamine-6sulfate connected by (1 B 4)- glycosidic linkages. Draw a part of heparin that shows one each of the two residues.arrow_forwardHow many chiral centers are in B-d-glucopyranose and a-D-galactopyranose? How many stereoisomers of these two aldohexoses can theoretically be drawn?arrow_forwardA What of the following is true about the cyclic structure of scheme A? (a) Pyranose ring ; b) Furanose ring ; c) Alpha anomeric configuration ; d) a and c ; e) b and carrow_forward
- Why is molecule "A" the major acetal formed when d-erythrose reacts with H2SO4 and acetone as opposed to molecule "B"?arrow_forward1 Draw D- glucose in a Fischer Projection. 2 Draw alpha-D- glucose and in the Hayworth (ring ) structure. 3 Draw the hydrolysis of maltose- the disaccharide composed of alpha D glucose molecules. 4 What is the chemical difference between cellulose and amylose NOTE- please dont explain too much explain to the pointarrow_forwardArrange the following sugars according to their DECREASING reactivity with Benedict’s reagent. [fructose, starch, maltose, sucrose, glucose]arrow_forward
- Another hexose gives the same aldaric acid on oxidation as does d-glucose. Which one?arrow_forwardProvide an explanation for the fact that α-D-mannose is more stable thanβ-D-mannose, whereas the opposite is true for glucose.arrow_forwardTwo sugars, A and B, are known to be glucose and galactose, but it is not certain which oneis which. On treatment with nitric acid, A gives an optically inactive aldaric acid, whileB gives an optically active aldaric acid. Which sugar is glucose, and which is galactose?arrow_forward
- Draw the structure of alpha-d-glucopyranose in straight chain cyclic, Haworth and cyclohexane-chair format. Draw the structures of two aldohexoses which are diastereomers but not epimersarrow_forwardExplain why lactose and maltose differs from sucrose in its chemical activity with Fehling’s, Benedict’s and using Seliwanoff’s reagents?arrow_forwardGive an 1-2 sentence explanation each of the effects/reactions in iodine test in Glucose, fructose, Galactose, Sucrose, Lactose, Maltose, and starcharrow_forward
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT