Concept explainers
(a)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
b)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
c)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
d)
Interpretation:
A sugar that is
Concept Introduction:
Epimer: Epimer is one of a pair of stereoisomers. Epimers are the monosaccharides which differ in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example,
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Chapter 16 Solutions
Essential Organic Chemistry, Global Edition
- What sugar is the C-3 epimer of d-xylose? . What sugar is the C-5 epimer of d-allose? What sugar is the C-4 epimer of l-gulose? d. What sugar is the C-4 epimer of d-lyxose?arrow_forwardD-Arabinose can exist in both pyranose and furanose forms. a. Draw the α and β anomers of D-arabinofuranose. b. Draw the α and β anomers of D-arabinopyranose.arrow_forwardPart A What sugar is the C-3 epimer of D-psicose? Spell out the full name of the compound.arrow_forward
- 15. Are mannose and galactose epimers? Allose and altrose? Gulose and talose? Ribose and arabinose? Consider only D-sugars. Explain your answers. 16. Which of the pairs in Problem 15 are diastereoisomers?arrow_forwardFor D-lyxose i. Draw an epimer at C3. ii. Draw a diastereomer that is not an epimer. iii. Draw the anomers of -D-lyxofuranose and -D-lyxopyranose. iv. Draw the product as Haworth projection when reacted with methanol catalysed by acid.arrow_forwardWhich one of the following is NOT a possible completion of the following reaction? CH₂OH HO- HO- 1. NaBH, ? 2. acidic workup HO- H A. D-talose B. D-tagatose C. the C-3 epimer of D-gulose D. the C-5 epimer of L-psicose E. the C-5 epimer of L-allose F. the C-3 epimer of D-idose G. g. the C-3 epimer of L-glucose -H -H -H -OH CH₂OHarrow_forward
- ОН 2. the Fischer projection that corresponds to the monosaccharide shown in the box. О н HO OH но- OH НО 0 OH OH OH H-OH -ОН 3. the Haworth projection that corresponds to the structure shown in the box. OCH, НО OH athul algasida О Н H-OH H-OH но-н но- HO -O OCH, OH O H H-OH НО-Н H-OH H-OH OH ОН НО НО OOCH, HO H-OH но-н но-н OH H-OH OH НО OH OCH, OH OH О н H-OH H-OH H НО но-н ОН НО -oOCH, ОН он онarrow_forwardWhich one of the following is NOT a possible completion of the following reaction? CH₂OH HO HO 1. NaBH 2. acidic workup HO 80 F3 A. D-talose B. D-tagatose C. the C-3 epimer of D-gulose D. the C-5 epimer of L-psicose E. the C-5 epimer of L-allose F. the C-3 epimer of D-idose G. g. the C-3 epimer of L-glucose OA B C OD OE OF U G H- F4 F5 H H -H -OH CH₂OH F6 F7 DII FBarrow_forwardDraw Fischer projection of the mirror image (enantiomer) D-robose c. Are these molecules superimposable? d. What type of isomerism is represented by these mirror images? e. Construct a model of a third isomer that is not a mirror image of the two above.arrow_forward
- 6. The Fischer projection for fructose is shown below. Is it a D-sugar or an L-sugar? a. It is a D-sugar because the hydroxyl at carbon A is to the right. b. It is a D-sugar because the carbonyl at carbon B is to the right. c. It is a D-sugar because the hydroxyl at carbon C is to the right d. It is an L-sugar because the carbonyl at carbon B is to the right. e. It is an L-sugar because the hydroxyl at carbon C is to the right. ACH2OH BFO H OH H OH H-OH CH2OH 7. Which of the following tynes of carbohydrates can be hydrelvzed to givo smaller molecules?arrow_forwardDraw the Fischer projections of the four aldotetroses. Draw the D-sugar on the left and its L-isomer directly to the right of it. Be sure you select the appropriate hydroxy group so that the bond carbon is connected to the oxygen bond. Draw D sugar 1 Draw L sugar 1 Answer Bank ČH2OH CH2OH H -OH НО- Draw D sugar 2 Draw L sugar 2 CH2OH CH2OH 00 00 00 00arrow_forwardWhat sugar is the C-4 epimer of d-lyxose?arrow_forward
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