(a) Interpretation: The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified. Concept introduction: When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Question

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Answer 1

Question

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

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What spectral features allow you to differentiate the product from the starting material? Use four separate paragraphs for each set of comparisons. You should have one paragraph each devoted to MS, HNMR, CNMR and IR. 2) For MS, the differing masses of molecular ions are a popular starting point. Including a unique fragmentation is important, too. 3) For HNMR, CNMR and IR state the peaks that are different and what makes them different (usually the presence or absence of certain groups). See if you can find two differences (in each set of IR, HNMR and CNMR spectra) due to the presence or absence of a functional group. Include peak locations. Alternatively, you can state a shift of a peak due to a change near a given functional group. Including peak locations for shifted peaks, as well as what these peaks are due to. Ideally, your focus should be on not just identifying the differences but explaining them in terms of functional group changes.

Answer 2

Question

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

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Answer 3

Question

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

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Answer 4

Question

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

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Answer 5

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Answer 6

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Answer 7

Chapter 20, Problem 35P

Interpretation Introduction

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The 4 Hydroxyl groups should be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Concept introduction:

Depending on the no. of Hydrogen atoms attached to the Carbon atom with hydroxyl group (-OH), they can be classified as primary (1 °), secondary (2 °) & tertiary (3 °) hydroxyls.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 20.1 - Label the hemiacetal carbonthe carbon bonded to...Ch. 20.2 - Prob. 20.1PP Ch. 20.2 - Prob. 20.2P Ch. 20.2 - Prob. 20.3P Ch. 20.2 - Prob. 20.4P Ch. 20.2 - Prob. 20.5P Ch. 20.2 - Prob. 20.2PP Ch. 20.2 - Prob. 20.6P Ch. 20.2 - Prob. 20.7P Ch. 20.3 - Prob. 20.8P

(a) Interpretation: The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified. Concept introduction: When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

Solution Summary: The author explains that hemiacetal carbon and OH group should be identified. The monosaccharide is presented in the Haworth projection.

Concept explainers

(a)

Interpretation:

The hemiacetal carbon and the −OH group in the hemiacetal carbon should be identified.

Concept introduction:

When an alcohol and ether group are attached to the same carbon, it is called the hemiacetal carbon.

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Chapter 20 Solutions