To draw: The chair conformation of β -D-mannopyranose. Interpretation: The chair conformation of β -D-mannopyranose is to be drawn. Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

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Answer 1

Question

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

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Part D. Do the two structures A and B of each pair drawn below represent the same molecule, constitutional isomers, or stereoisomers? If A and B are stereoisomers, further classify them as enantiomers or diastereomers.

The following statements about the chair conformation of D glucopyranose are true EXCEPT * a. The axial positions are occupied by hydroxyl groups b. It is the more stable configuration of D-glucopyranose c. The Equatorial substituents about the ring are staggered so that they alternately extend above and below the mean plane of the ring d. The equatorial positions are occupied by hydroxyl groups

Part F. Draw the most stable sawhorse conformation of cis-1,3- diphenylcyclohexane. Part G. Draw the structure of meso-1,2-dimethylcyclopentane.

Answer 2

Question

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

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Answer 3

Question

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

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Answer 4

Question

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

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Answer 5

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 6

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 7

Chapter 23, Problem 23.47SP

(a)

Interpretation Introduction

To draw: The chair conformation of β-D-mannopyranose.

Interpretation: The chair conformation of β-D-mannopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 8

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 9

(b)

Interpretation Introduction

To draw: The chair conformation of α-D-allopyranose.

Interpretation: The chair conformation of α-D-allopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 10

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 11

(c)

Interpretation Introduction

To draw: The chair conformation of β-D-galactopyranose.

Interpretation: The chair conformation of β-D-galactopyranose is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 12

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 13

(d)

Interpretation Introduction

To draw: The chair conformation of N-acetylglucosamine.

Interpretation: The chair conformation of N-acetylglucosamine is to be drawn.

Concept introduction: Cyclic monosaccharides are drawn with the help of Fisher projection. The groups on the right side of fisher projection are projected downwards in the cyclic structure while groups on the left side are projected upwards. In Haworth projection or chair conformation, oxygen is present at the back, right-hand corner with C1 at the far right.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 23.2 - Prob. 23.1P Ch. 23.3A - Prob. 23.2P Ch. 23.3A - Prob. 23.3P Ch. 23.3B - Draw and name the enantiomers of the sugars shown...Ch. 23.3B - Prob. 23.5P Ch. 23.3C - Prob. 23.6P Ch. 23.4 - Draw the Haworth projection for the cyclic...Ch. 23.4 - Prob. 23.8P Ch. 23.4 - Prob. 23.9P Ch. 23.4 - Prob. 23.10P

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