Concept explainers
(a)
Interpretation: The enantiomer of D-fructose is to be drawn.
Concept introduction: A sugar molecule in which hydroxyl group of second last carbon atom is on the left and right side of the horizontal line is known as
(b)
Interpretation: An epimer of D-fructose at
Concept introduction: Two compounds which are neither superimposable nor mirror images to each other and the configuration of one of their stereogenic centers is different are known as epimers.
(c)
Interpretation: An epimer of D-fructose at
Concept introduction: Two compounds which are neither superimposable nor mirror images to each other and the configuration of one of their stereogenic centers is different are known as epimers.
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ORG.CHEMISTRY W/ACCESS+MODEL KIT PKG
- Draw the following monosaccharides, using chair conformations for the pyranoses andHaworth projections for the furanoses.(a) a-d-mannopyranose (C2 epimer of glucose)(b) b-d-galactopyranose (C4 epimer of glucose)(c) b-d-allopyranose (C3 epimer of glucose)(d) a-d-arabinofuranose(e) b-d-ribofuranose (C2 epimer of arabinose)arrow_forwardWithout referring to the chapter, draw the chair conformations of(a) b-d-mannopyranose (the C2 epimer of glucose).(b) a-d-allopyranose (the C3 epimer of glucose).(c) b-d-galactopyranose (the C4 epimer of glucose)arrow_forwardWhich one is b-D glucose and which one is a-L glucose ? 2. Which one is b-fructose and which a-L fructose?arrow_forward
- Circle the correct answer in each sentence. Projection 1 is a (boat ; fischer ; haworth ; sawhorse) projection. Projection 2 is a (boat ; fischer ; haworth ; sawhorse) projection. This sugar is a (pentose ; hexose) and is a (aldose ; ketose). It is classified as a (simple ; complex) carbohydrate. This is the (L- ; D-) enantiomer of this sugar.arrow_forward5-Deoxyglucose will close to a?arrow_forwardWhat is the configuration of each of the asymmetric centers in the Fischer projection of a. D-glucose? b. D-galactose? c. D-ribose? d.D-xylose? e.D-sorbose?arrow_forward
- Consider alanine a. How many chiral centers? b. How many stereoisomers? c. Draw the fischer projection for each stereoisomer and determine the absolute configuration for each chiral center.arrow_forwardGiven the Fisher projection of D-Idose: 1) Draw a three-dimensional line structure of D-Idose using the template below. 2) Use the template below to convert D-Idose to the Haworth projection. Draw the β- anomer.arrow_forwardDraw the enantiomer and a diastereomer for the compound shown below, and label them as D and L sugarsarrow_forward
- A) Draw the structure of any aldohexose in the pyranose ring form. B) Draw the structure of the anomer of the aldohexose you drew above. C) How many asymmetric carbons (chiral centers) does each of these structures have? D) How many stereoisomers of the aldohexoses you drew are theoretically possible?arrow_forwardDraw the monosaccharide that results when structure I is treated with HNO3. Is theresulting product optically active?arrow_forwarda. Draw the Fischer projection of monosaccharide A below. Hint: Place the carbonyl group close to the top of the drawing. Name monosaccharide A. b. Use the given template to draw the most stable conformation of monosaccharide A.arrow_forward
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