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_forwardSOURCE: 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_forward
- Consider 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_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_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
- Consider 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_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
- 3. HO" он HO. но, но HO OH Solanine Solanine is a naturally occurring compound that contain glycoside bonds as part of its structure. Determine the structure of aglycon and monosaccharides fomed when solanine is hydrolyzed with aqueous acid. Include all the appropriate anomers.arrow_forwardThe following trisaccharide derivative is important to human health.The A ring is ?-deoxy?arrow_forwarda. D-(+)-mannose is a diastereomer of glucose that is important in protein glycosylation. Find the Fischer projection of D-(+)-mannose in your textbook (Chapter 23), and draw it very clearly below. b. Draw a box around the chiral center furthest from the aldehyde/ketone. (This is the carbon which can be used to determine whether the carbohydrate is D- or L-.) c. Clearly label each of the chiral centers on D-(+)-mannose with its correct (R) or (S) configuration. d. D-(+)-mannose has two different Haworth projections-one that is a and one that is ß. Draw both Haworth projections for D-(+)-mannose, and label each as either a or B. e. In addition to Benedict's test, several other chemical tests can provide information about the type(s) of carbohydrate present in a given solution. These include Barfoed's test, Seliwanoff's test, and Bial's test. Use the internet to research what each test's possible results are, and what those results tell you about the carbohydrate's structure. Note: You…arrow_forward
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage Learning