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
- Answer the following questions using the Haworth structure drawn below. Но. CH2 HO, ОН OH ОН a. Identify this monosaccharide. b. Is this the a or ß isomer. c. In solution the cyclic structure above can open and close to form the other isomer. Which structure below is the other isomer that is present in solution? I. II. III. CH2OH O OH CH2OH но -СН, о OH OH OH но CH2 -OH OH ÓH ÓH OHarrow_forward3) Give an example of: a. A compound with 2 or more stereocenters that is superimposable on its mirror image. b. A pair of compounds that are chiral but are non-superimposable and non-mirror images. c. A pair of compounds with 2 or more stereocenters that are non-superimposable and mirror images.arrow_forwardThreonine 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_forward
- 3. An amino acid has a -CH,CH3 side chain. What type of side chain could form hydrogen bonds with this side chain? O a. -CH2-OH b. -CH,- C. -CH,-C-NH, d. none of the abovearrow_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 αα or ββ and use numbers to designate its location between two rings (e.g., 1→→4-ββ)-c. What products are formed when stachyose is hydrolyzed with H33O++?d. Is stachyose a reducing sugar?e. What product is formed when stachyose is treated with excess CH33I, Ag22O?f. What products are formed when the product in (e) is treated with H33O++?arrow_forwardExplain the difference between an enantiomer and an epimer. a. Enantiomers are non-superimposable mirror image structures. Epimers are diastereomers that differ only in the orientation of one chiral center. b. Epimers are non-superimposable mirror image structures. Enantiomers are diastereomers that differ only in the orientation of one chiral center.arrow_forward
- 2arrow_forwardH CH,OH Br Br HO НО С. d. OH -NH H NH2 CH,CI OH f. НОСН, —СН—СНО е. `CH3 CI 3. Draw the enantiomer and diastereomer of the following molecule. OH H. CH; NH, natural alanine 4. Draw the enantiomer and diastereomer of the following molecule. a. b. CH, H H H,C H CH CH H 5. a) Which structures are Enantiomers? b) Which structures are Diastereomers? c) Which structures are meso compounds? Use the letters only for your answers. A. В. Cl H H. H. CI CI H CI C. H H D. H. Cl CI CI H END 41/42arrow_forwardCan you help me to solve this?arrow_forward
- What type of glycosidic linkage is between the two monosaccharides? Select one: a. a-1,4 b. B-1,4 c. a-1,6 d. B-1,2 e. a-1,2 CH₂OH CH₂OH OH OH OH OH ОН ОНarrow_forwardWhich of the following is FALSE? a. D-altrose and D-talose have the same osazones. b. D-glucose and D-galactose have different osazones. c. Trioses and tetroses cannot form the furfural derivatives because of their inability to form the 5-membered ring. d. Barfoed’s reagent, a weaker oxidizing agent than Benedict’s reagent, can only oxidize monosaccharides.arrow_forward(d) Draw the structure of the expected product when monosaccharide B undergo mutarotation upon dissolving in water in the presence of Tollens reagent (AGNO3, NHẠOH). он OH O. OH OH OH monosaccharide Barrow_forward
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning