The three-dimensional formula for isomer of aldotetrose and ketopentose is to be written and each isomer as D or L sugar is to be designated. Concept introduction: Monosaccharides containing 3-carbon atoms are called triose , 4-carbon atoms are called tetrose, 5-carbon atoms are called pentose, and so on. In chiral molecules, carbon atom having four non-identical substituent groups is called the chirality center of that molecule. Chirality center may also be called stereocenter, which signifies any point in the molecule where the interchanging of any two groups may lead to stereoisomers. Monosaccharide having its highest chirality center same as that of D (or +) − Glyceraldhyde is designated as D − Sugar , conversely, if the same monosaccharide has its highest chirality center same as that of L (or − ) − Glyceraldhyde , it is designated as L − Sugar .

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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 22, Problem 2PP

Interpretation Introduction

Interpretation:

The three-dimensional formula for isomer of aldotetrose and ketopentose is to be written and each isomer as D or L sugar is to be designated.

Concept introduction:

Monosaccharides containing 3-carbon atoms are called triose, 4-carbon atoms are called tetrose, 5-carbon atoms are called pentose, and so on.

In chiral molecules, carbon atom having four non-identical substituent groups is called the chirality center of that molecule. Chirality center may also be called stereocenter, which signifies any point in the molecule where the interchanging of any two groups may lead to stereoisomers.

Monosaccharide having its highest chirality center same as that of D (or +)−Glyceraldhyde is designated as D−Sugar, conversely, if the same monosaccharide has its highest chirality center same as that of L (or −)−Glyceraldhyde, it is designated as L−Sugar.

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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 22, Problem 2PP

Interpretation Introduction

Interpretation:

The three-dimensional formula for isomer of aldotetrose and ketopentose is to be written and each isomer as D or L sugar is to be designated.

Concept introduction:

Monosaccharides containing 3-carbon atoms are called triose, 4-carbon atoms are called tetrose, 5-carbon atoms are called pentose, and so on.

In chiral molecules, carbon atom having four non-identical substituent groups is called the chirality center of that molecule. Chirality center may also be called stereocenter, which signifies any point in the molecule where the interchanging of any two groups may lead to stereoisomers.

Monosaccharide having its highest chirality center same as that of D (or +)−Glyceraldhyde is designated as D−Sugar, conversely, if the same monosaccharide has its highest chirality center same as that of L (or −)−Glyceraldhyde, it is designated as L−Sugar.

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Answer 3

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 22, Problem 2PP

Interpretation Introduction

Interpretation:

The three-dimensional formula for isomer of aldotetrose and ketopentose is to be written and each isomer as D or L sugar is to be designated.

Concept introduction:

Monosaccharides containing 3-carbon atoms are called triose, 4-carbon atoms are called tetrose, 5-carbon atoms are called pentose, and so on.

In chiral molecules, carbon atom having four non-identical substituent groups is called the chirality center of that molecule. Chirality center may also be called stereocenter, which signifies any point in the molecule where the interchanging of any two groups may lead to stereoisomers.

Monosaccharide having its highest chirality center same as that of D (or +)−Glyceraldhyde is designated as D−Sugar, conversely, if the same monosaccharide has its highest chirality center same as that of L (or −)−Glyceraldhyde, it is designated as L−Sugar.

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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 22, Problem 2PP

Interpretation Introduction