(a) Interpretation: The chemical shifts of the given absorptions are to be calculated. Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula, Chemical shift = Observed chemical shift ( in Hz ) downfield from TMS υ of the NMR spectrometer ( in MHz )

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Answer 1

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Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

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The 1H NMR spectrum of 1,2-dimethoxyethane (CH3OCH2CH2OCH3) recorded on a 300 MHz NMR spectrometer consists of signals at 1017 Hz and 1065 Hz downfield from TMS.(a) Calculate the chemical shift of each absorption. (b) At what frequency would each absorption occur if the spectrum were recorded on a 500 MHz NMR spectrometer?

The 1H NMR spectrum of 1,2-dimethoxyethane (CH3OCH2CH2OCH3) recorded on a 300 MHz NMR spectrometer consists of signals at 1017 Hz and 1065 Hz downeld from TMS. (a) Calculate the chemical shift of each absorption. (b) At what frequency would each absorption occur if the spectrum were recorded on a 500 MHz NMR spectrometer?

The 1H NMR spectrum of CH3OH recorded on a 500 MHz NMR spectrometer consists of two signals, one due to the CH3 protons at 1715 Hz and one due to the OH proton at 1830 Hz, both measured downfield from TMS. (a) Calculate the chemical shift of each absorption. (b) Do the CH3 protons absorb upfield or downfield from the OH proton?

Answer 2

Question

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

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Answer 3

Question

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

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Answer 4

Question

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

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Answer 5

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Answer 6

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Answer 7

Chapter 12C.1, Problem 2P

Interpretation Introduction

(a)

Interpretation: The chemical shifts of the given absorptions are to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Answer 8

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Answer 9

Interpretation Introduction

(b)

Interpretation: The frequency of each absorption at 500 MHz is to be calculated.

Concept introduction: In NMR spectrum, peaks are known as resonances, lines or absorptions. On the horizontal axis, the position of absorption is generally referred to as chemical shift. The chemical shift of any absorption is calculated by the formula,

Chemical shift=Observed chemical shift(in Hz)downfield from TMSυ of the NMR spectrometer(in MHz)

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 12C.1 - Problem 14.1 The NMR spectrum of recorded on a ...Ch. 12C.1 - Prob. 2P Ch. 12C.2 - How many 1H NMR signals does each...Ch. 12C.2 - How many 1H NMR signals does each compound give?...Ch. 12C.2 - Label the protons in each highlighted CH2 group as...Ch. 12C.2 - How many 1H NMR signals would you expect for each...Ch. 12C.3 - Prob. 9P Ch. 12C.3 - For each compound, first label each different type...Ch. 12C.3 - Label each statement as True or False. a. When a...Ch. 12C.4 - Prob. 12P

Solution Summary: The author explains how the chemical shifts of the first and second absorptions are calculated.

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Chapter 12C Solutions