The structure of aldehexose A which on reaction with nitric acid gives aldaric acid is to be identified Concept introduction: Aldoses are the carbohydrates in which an aldehyde group is present. The aldehyde carbon is numbered one in Fischer projection. A carbohydrate which consists of six carbon atoms chain and an aldehyde group is known as aldohexose.

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Answer 1

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 24, Problem 24.28P

Interpretation Introduction

Interpretation:

The structure of aldehexose A which on reaction with nitric acid gives aldaric acid is to be identified

Concept introduction:

Aldoses are the carbohydrates in which an aldehyde group is present. The aldehyde carbon is numbered one in Fischer projection. A carbohydrate which consists of six carbon atoms chain and an aldehyde group is known as aldohexose.

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How many asymmetric carbons and stereoisomers are there for an aldohexose? For aketohexose?

An important technique for establishing relative configurations among isomeric aldoses and ketoses is to convert both terminal carbon atoms to the same functional group. This can be done either by selective oxidation or reduction. As a specific example, nitric acid oxidation of d-erythrose gives meso-tartaric acid . Similar oxidation of d-threose gives (2S,3S)-tartaric acid. Given this information and the fact that d-erythrose and d-threose are diastereomers, draw Fischer projections for d-erythrose and d-threose. Check your answers against Table 25.1.

How many chiral centers are in B-d-glucopyranose and a-D-galactopyranose? How many stereoisomers of these two aldohexoses can theoretically be drawn?

Answer 2

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 24, Problem 24.28P

Interpretation Introduction

Interpretation:

The structure of aldehexose A which on reaction with nitric acid gives aldaric acid is to be identified

Concept introduction:

Aldoses are the carbohydrates in which an aldehyde group is present. The aldehyde carbon is numbered one in Fischer projection. A carbohydrate which consists of six carbon atoms chain and an aldehyde group is known as aldohexose.

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Answer 3

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Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 24, Problem 24.28P

Interpretation Introduction

Interpretation:

The structure of aldehexose A which on reaction with nitric acid gives aldaric acid is to be identified

Concept introduction:

Aldoses are the carbohydrates in which an aldehyde group is present. The aldehyde carbon is numbered one in Fischer projection. A carbohydrate which consists of six carbon atoms chain and an aldehyde group is known as aldohexose.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 24, Problem 24.28P

Interpretation Introduction