Whether each of the given structures is D -glyceraldehyde or L -glyceraldehyde is to be stated. Concept Introduction: The configurations of carbohydrates are described by the notations “ D ” and “ L ”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one. Almost all the sugars found in nature are D -sugars. The mirror image of D -sugar is L -sugar. The notations “ D ” and “ L ” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D -sugar. If that same “OH” group is on the left, then the compound is an L -sugar.

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Answer 1

Question

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

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く Predicting the pr Predict the major products of the following organic reaction: Δ Some important notes: • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. • Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. ? Click and drag to start drawing a structure.

propose synthesis

Explanation O Conjugated Pi Systems Deducing the reactants of a Diels-Alder reaction Can the molecule on the right-hand side of this organic reaction be made in good yield from no more than two reactants, in one step, by moderately heating the reactants? ? Δ If your answer is yes, then draw the reactant or reactants in the drawing area below. You can draw the reactants in any arrangement you like. • If your answer is no, check the box under the drawing area instead. Click and drag to start drawing a structure. X

Answer 2

Question

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

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Answer 3

Question

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

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Answer 4

Question

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

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Answer 5

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 6

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 7

Chapter 20.2, Problem 3P

a)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically.

All the carbon atoms of the chain are represented by the center of the crossing line. The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 8

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 9

b)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 10

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 11

c)

Interpretation Introduction

Interpretation:

Whether each of the given structures is D-glyceraldehyde or L-glyceraldehyde is to be stated.

Concept Introduction:

The configurations of carbohydrates are described by the notations “D” and “L”. In Fischer projection carbon chain is depicted vertically. All the carbon atoms of the chain are represented by the center of the crossing line.

The functional group like ketone group has the lowest possible priority two and the aldehydic group has the lowest priority one.

Almost all the sugars found in nature are D-sugars. The mirror image of D-sugar is L-sugar.

The notations “D” and “L” are based on the presence of “OH” group. If the “OH” group attached to the bottommost asymmetric center of a Fischer projection, is on the right then the compound is a D-sugar. If that same “OH” group is on the left, then the compound is an L-sugar.

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 20.1 - Prob. 1P Ch. 20.2 - Prob. 2P Ch. 20.2 - Prob. 3P Ch. 20.3 - Prob. 4P Ch. 20.3 - Prob. 5P Ch. 20.3 - Prob. 6P Ch. 20.4 - Prob. 7P Ch. 20.4 - Prob. 8P Ch. 20.5 - Prob. 9P Ch. 20.5 - Prob. 10P

Solution Summary: The author explains the structure of glyceraldehyde in Fischer projection. The carbonyl group is placed on top in case of aldose and on as close to the top as possible.

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