Concept explainers
Interpretation:
The three-dimensional formula for isomer of aldotetrose and ketopentose is to be written and each isomer as D or L sugar is to be designated.
Concept introduction:
Monosaccharides containing 3-carbon atoms are called triose, 4-carbon atoms are called tetrose, 5-carbon atoms are called pentose, and so on.
In chiral molecules, carbon atom having four non-identical substituent groups is called the chirality center of that molecule. Chirality center may also be called stereocenter, which signifies any point in the molecule where the interchanging of any two groups may lead to stereoisomers.
Monosaccharide having its highest chirality center same as that of
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Organic Chemistry
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- 19 & 20. 19. 20. Consider the following synthetic estrogen shown below O= H Im Compound X The maximum number of stereoisomers in X is Illllllll CH3 a OH CH3 Draw compound X below and prioritize the groups present in the stereocenter labeled as a.arrow_forwardDraw the structure of: (a) a polysaccharide formed by joining D-mannose units in 1->4-ß-glycosidic linkages; (b) a polysaccharide formed by joining D-glucose units in 1->6-a-glycosidic linkages. The polysaccharide in (b) is dextran, a component of dental plaque.arrow_forwardSuggest how you could distinguish a sample of glucose from a sample of maltose using Benedict’s reagent. [Hint: maltose is a disaccharide reducing sugar].arrow_forward
- can you please add an explanation.arrow_forwardWhich D-aldopentose is oxidized to an optically active aldaric acid and undergoes the Wohl degradation to yield a D-aldotetrose that is oxidized to an optically active aldaric acid?arrow_forwardCellulose is treated with methanol, which methylates the reducing end of polysaccharides. (a) How many methyl groups would be incorporated per cellulose chain? Explain. (b) Relative to cellulose, how many methyl groups would be incorporated in a molecule of amylopectin? (more, less or the same?) Explain. (c) Cellulose is treated with dimethyl sylfate, which adds a methyl group to all free hydroxyl groups. The cellulose is then hydrolyzed to release all of its monosacharides. Draw the structure of the resulting monosaccharidearrow_forward
- d-Xylose and d-lyxose are formed when d-threose undergoes a Kiliani–Fischer synthesis. d-Xylose is oxidized to an optically inactive aldaric acid,whereas d-lyxose forms an optically active aldaric acid. What are the structures of d-xylose and d-lyxose?arrow_forwardAn aldose A, is reduced by sodium borohydride to an optically inactive alditol B. The Ruff degredation of A forms C. Oxidation of C by nitric acid generates the optically inactive diacid D. The ruff degreation of C forms D-glyceraldehyde. draw the structures for compounds A through D and discuss a mechanism for the reduction step using sodium borohydridearrow_forward23.1(b,d and e)arrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning