The pyranose form of glucose is just one of the cyclic forms that glucose can adopt. It’s also possible for the hydroxyl group on C-4 of glucose to attack the aldehyde . This forms a five-membered ring. We call this form the furanose form, in reference to the cyclic 5-membered ether furan.

Question

(a) Figure 23-2 shows that the degradation of d-glucose gives d-arabinose, an aldopentose.Arabinose is most stable in its furanose form. Draw d-arabinofuranose.(b) Ribose, the C2 epimer of arabinose, is most stable in its furanose form. Drawd-ribofuranose.

Answer 1

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 25.5, Problem 12P

Interpretation Introduction

Interpretation:

The pyranose form of glucose is just one of the cyclic forms that glucose can adopt. It’s also possible for the hydroxyl group on C-4 of glucose to attack the aldehyde. This forms a five-membered ring. We call this form the furanose form, in reference to the cyclic 5-membered ether furan.

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(a) Figure 23-2 shows that the degradation of d-glucose gives d-arabinose, an aldopentose.Arabinose is most stable in its furanose form. Draw d-arabinofuranose.(b) Ribose, the C2 epimer of arabinose, is most stable in its furanose form. Drawd-ribofuranose.

Answer 2

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 25.5, Problem 12P

Interpretation Introduction

Interpretation:

The pyranose form of glucose is just one of the cyclic forms that glucose can adopt. It’s also possible for the hydroxyl group on C-4 of glucose to attack the aldehyde. This forms a five-membered ring. We call this form the furanose form, in reference to the cyclic 5-membered ether furan.

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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 25.5, Problem 12P

Interpretation Introduction

Interpretation:

The pyranose form of glucose is just one of the cyclic forms that glucose can adopt. It’s also possible for the hydroxyl group on C-4 of glucose to attack the aldehyde. This forms a five-membered ring. We call this form the furanose form, in reference to the cyclic 5-membered ether furan.

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Check out sample textbook solution

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 25.5, Problem 12P

Interpretation Introduction