(a) Interpretation: The appearance of the high resolution 13 C spectrum of methyl formate when the protons are not decoupled should be predicted. Concept introduction: 13 C isotope of carbon has low natural abundance . 12 C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since 13 C is less likely to find in nature there is a very low probability of finding two 13 C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in 13 C NMR spectra. But there are 13 C and 1 H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified 13 C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Question

Want to see the full answer?

Answer 1

Question

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Select to Edit Arrows H H Select to Add Arrows > H CFCI: Select to Edit Arrows H Select to Edit Arrows

Show work with explanation needed. don't give Ai generated solution

Show work. don't give Ai generated solution

Answer 2

Question

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 6

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 7

Chapter 19, Problem 19.22QAP

Interpretation Introduction

(a)

Interpretation:

The appearance of the high resolution ¹³C spectrum of methyl formate when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetaldehyde when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 10

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The appearance of the high resolution ¹³C spectrum of acetone when the protons are not decoupled should be predicted.

Concept introduction:

¹³C isotope of carbon has low natural abundance. ¹²C is the most abundant isotope in nature. But it is NMR inactive because the spin quantum number is zero. Since ¹³C is less likely to find in nature there is a very low probability of finding two ¹³C nuclei which are close to each other. So there is no observable spin-spin coupling between adjacent carbons in ¹³C NMR spectra. But there are ¹³C and ¹H coupling which leads to large number of splitting patterns in the spectrum. To obtain simplified ¹³C spectrum scientists use a method called broadband decoupling. This technique avoids the C-H coupling signal, so that all carbon signals appear as singlets.

Answer 12

Expert Solution & Answer

Answer 13

Expert Solution & Answer

Answer 14

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 15

Ch. 19 - Prob. 19.1QAP Ch. 19 - Prob. 19.2QAP Ch. 19 - Prob. 19.3QAP Ch. 19 - Prob. 19.4QAP Ch. 19 - Prob. 19.5QAP Ch. 19 - A nucleus has a spin quantum number of 7/2. How...Ch. 19 - Prob. 19.7QAP Ch. 19 - Prob. 19.8QAP Ch. 19 - Prob. 19.9QAP Ch. 19 - Why is 133C-133C spin-spin splitting not observed...

Solution Summary: The author explains that 13 C is the most abundant isotope in nature, but it is NMR inactive because the spin quantum number is zero.

Want to see the full answer?

Chapter 19 Solutions