The structure of phenylalanine as it exists in D 2 O solution is to be stated. Concept introduction: The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7 − 8 ppm .

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Answer 1

Question

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

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There are 48 pairs of students in the following table. Each pair has quantitatively determined the mass of taurine in a 250 mL can of the popular energy drink marketed as “Munster” using High Performance Liquid Chromatography (HPLC). The class results are presented below: QUESTION: Summarise and report these results including an indication of measurement uncertainty. In both calculation samples calculate if an outlier is present, max value, number of samples, mean, standard deviation, g (suspect), g (critical) and t (critical). Mass of Taurine (mg) Mass of Taurine (mg) (Table continued) 152.01 152.23 151.87 151.45 154.11 152.64 152.98 153.24 152.88 151.45 153.49 152.48 150.68 152.33 151.52 153.63 152.48 151.68 153.17 153.40 153.77 153.67 152.34 153.16 152.57 153.02 152.86 151.50 151.23 152.57 152.72 151.54 146.47 152.38 152.44 152.54 152.53 152.54 151.32…

Indicate the rate expressions for reactions that have order 0, 1, and 2.

Answer 2

Question

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

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Answer 3

Question

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

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Answer 4

Question

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

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Answer 5

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 6

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 7

Chapter 24, Problem 24.47SP

(a)

Interpretation Introduction

Interpretation:

The structure of phenylalanine as it exists in D2O solution is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The peaks in the spectrum are to be assigned to the protons in the structure.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 10

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 11

(c)

Interpretation Introduction

Interpretation:

The reason for the absence of −NH2 or −COOH protons in the spectrum is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighboring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 12

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 13

(d)

Interpretation Introduction

Interpretation:

The relationship between the two protons that generate nearly mirror-image multiplets at 3.1 and 3.3 is to be stated.

Concept introduction:

The peaks in NMR spectrum are due to hydrogen atoms. Different signals are produced from different neighbouring substituents of hydrogen atoms. Information about the structure of a compound is obtained by chemical shifts. Peaks due to aromatic protons occur between 7−8 ppm.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 24.2A - Draw three-dimensional representations of the...Ch. 24.2A - Prob. 24.2P Ch. 24.2B - The herbicide glyphosate (Roundup) kills plants by...Ch. 24.4 - Draw the structure of the predominant form of a....Ch. 24.4 - Draw the resonance forms of a protonated guanidino...Ch. 24.4 - Although tryptophan contains a heterocyclic amine,...Ch. 24.4 - Prob. 24.7P Ch. 24.4 - Prob. 24.8P Ch. 24.5A - Show how the following amino acids might be formed...Ch. 24.5B - Prob. 24.10P

Solution Summary: The author explains the structure of phenylalanine in D_TextO solution. The peaks in NMR spectrum are due to hydrogen atoms.

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Chapter 24 Solutions