(a) Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified. Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Question

Which highlighted bond in each pair absorbs at higher wavenumber?

Answer 1

Question

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

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Which highlighted bond in each pair absorbs at higher wavenumber?

For each compound, first label each different type of proton and then rank the protons in order of increasing chemical shift.

For attached each compound, give the number of 1H NMR signals and then determine how many peaks are present for each NMR signal.

Answer 2

Question

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

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Answer 3

Question

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

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Answer 4

Question

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

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Answer 5

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 6

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 7

Chapter 12C.3, Problem 9P

Interpretation Introduction

(a)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 8

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 9

Interpretation Introduction

(b)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 10

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 11

Interpretation Introduction

(c)

Interpretation: The protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

Concept introduction: Depending upon the electron density or the concentration of electron around the proton the chemical shift values of the proton varies relative to the reference signal. The terms, upfield and downfield expresses the relative location of signals. The meaning of upfield is to the right and of downfield is to the left.

Answer 12

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Answer 23

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 that the protons on the highlighted carbons of the given compound that absorbs farther downfield are to be identified.

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Chapter 12C Solutions