The D-aldopentoses which can be reduced to optically inactive alditols using NaBH 4 , CH 3 OH is to be predicted. Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones . The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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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 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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How many signals do you expect in the H NMR spectrum for this molecule? Br Br Write the answer below. Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H atoms that would contribute to the same signal as the H already highlighted red. Note for advanced students: In this question, any multiplet is counted as one signal. Number of signals in the 'H NMR spectrum. For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in top molecule For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute to the same signal as the H atom already highlighted red. If no other H atoms will contribute, check the box at right. No additional Hs to color in bottom molecule

In the drawing area below, draw the major products of this organic reaction: 1. NaOH ? 2. CH3Br If there are no major products, because nothing much will happen to the reactant under these reaction conditions, check the box under the drawing area instead. No reaction. Click and drag to start drawing a structure. ☐ : A ค

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 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

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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 28, Problem 28.56P

Interpretation Introduction

Interpretation: The D-aldopentoses which can be reduced to optically inactive alditols using NaBH4, CH3OH is to be predicted.

Concept introduction: Carbohydrates are naturally occurring compounds. Carbohydrates are polyhydroxy aldehydes or ketones. The monosaccharide with five carbon atoms and aldehyde group is known as D-aldopentoses. The monosaccharide in which the aldehyde or ketone group is replaced with alcohol group is known as alditols.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

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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 28, Problem 28.56P

Interpretation Introduction