Concept explainers
(a)
Interpretation: The four possible stereoisomers of threonine by using wedges and dashes are to be drawn.
Concept introduction: Isomers are the compounds with similar formula and different structures. Stereoisomers are a type of isomers in which arrangement of atoms differ in space. Or the compounds that have same molecular formula but they differ in the arrangement of atoms or groups in the space are known as stereoisomers.
(b)
Interpretation: The structure which corresponds to an amino acid with
Concept introduction: The stereochemistry of the compound is determined by prioritizing the groups attached to its stereogenic center. The groups are prioritized on the basis of
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Organic Chemistry
- SOURCE: GENERAL ORGANIC AND BIOLOGICAL CHEMISTRY BY SMITH 4TH EDITIONarrow_forward43. Specify expressions specific to panaxosides. I. taken from ginseng II. there are glucose and arabinose monosaccharides in this compound III. taken from Japanese angelica-tree IV. tetratcyclic triterpen saponins V. spirostanol type glycoside VI. dimer structure VII. biglycosides VIII. dammaran group IX. differ for number of hydroxyl groups X. furostanol type glycoside A) II; VI; VII; IX; X B) III; V; VIII C) I; IV; VIII; IX D) I; VIII; IX E) I; III; V; VII; VIII; Xarrow_forwardConsider the tetrasaccharide stachyose drawn below. Stachyose is found in white jasmine, soybeans, and lentils. Because humans cannot digest it, its consumption causes flatulence.a. Label all glycoside bonds.b. Classify each glycosidic linkage as α or β and use numbers to designate its location between two rings (e.g., 1→4-β).c. What products are formed when stachyose is hydrolyzed with H3O+?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH3I, Ag2O?f. What products are formed when the product in (e) is treated with H3O+?arrow_forward
- 3. The molecule to the right is: A. Cys-His with a trans peptide bond B. Cys-Pro with a trans peptide bond C. Pro-Cys with a trans peptide bond D. Pro-Cys with a cis peptide bond E. Cys-Pro with a cis peptide bond H₂N SH -COOHarrow_forwardDraw the enantiomer and diastereomer of the following molecule. OH Cim H CH, NH, natural alanine Draw the enantiomer and diastereomer of the following molecule. а. b. СH, Н H HC H CH, CH, Harrow_forwardWhich monosaccharide is a-glucose? CH,OH CH,OH CH;OH CH,OH H. H. OH H. OH HO. H. OH H. H. H. HO. H. OH H. H. H. OH H. H. H. OH H. H. H. H. H. C OD O B O C OA A,arrow_forward
- A trisaccharide obtained from the partial hydrolysis of amylopectin showed two glycosidic linkages. A. Draw the structure of the trisaccharide B. If the trisaccharide is to be exhaustively methylated and subsequently hydrolyzed with an acid, how many different methylated products will be obtained? Draw their structures. C. Can an aqueous solution of the trisaccharide precipitate Cu as Cu2O? If it can, encircle the potential carbonyl carbon(s) in the trisaccharide. D. Can the trisaccharide exist in different anomeric forms? If yes, draw their structures.arrow_forwardConsider the structure below: HOH H. но H. H- H. он он он HO. H. H. OH O H. HO он H- H. он H. Is the trisaccharide a reducing sugar? [ Choose ] Identify the type of glycosidic linkage of the [Choose ] colored bond.arrow_forward9. A trisaccharide obtained from the partial hydrolysis of amylopectin showed two glycosidic linkages. A. Draw the structure of the trisaccharide B. If the trisaccharide is to be exhaustively methylated and subsequently hydrolyzed with an acid, how many different methylated products will be obtained? Draw their structures. C. Can an aqueous solution of the trisaccharide precipitate Cu as Cu₂O? If it can, encircle the potential carbonyl carbon(s) in the trisaccharide. D. Can the trisaccharide exist in different anomeric forms? If yes, draw their structures.arrow_forward
- Threonine is a naturally occurring amino acid that has two stereogenic centers. a. Draw the four possible stereoisomers using wedges and dashes. b. The naturally occurring amino acid has the 2S, 3R configuration at its OH two stereogenic centers. Which structure does this correspond to?arrow_forwardDraw a diastereomers of D- Glucosearrow_forward1. Which sugars are reducing? Which sugars are non-reducing? a. Glucose: b. Fructose: c. Sucrose: d. Lactose: e. Sucrose hydrolysate: Starch hydrolysate: g. Cellulose hydrolysate: f. 2. What structural feature is responsible for the reducing property of carbohydrates?arrow_forward
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning