Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
Question
Book Icon
Chapter 19, Problem 19.21QAP
Interpretation Introduction

(a)

Interpretation:

The appearance of the high-resolution 13C spectrum of (proton decoupled) methyl formate is to be stated.

Concept introduction:

The whole signals that appear in the proton decoupled 13C NMR spectrum are a singlet. Due to several reasons, the carbon atoms are do not coupled with the adjacent carbon atom. The only condition to form 13C13C bond is that two 13C atoms must be adjacent to each other. It is almost impossible for two 13C nuclei to be adjacent to each other because the presence 13C atoms in nature are less abundant and also the 13C nuclei do not couple with the 12C nuclei because of zero spin quantum number.

Interpretation Introduction

(b)

Interpretation:

The appearance of the high-resolution 13C spectrum of (proton decoupled) acetaldehyde is to be stated.

Concept introduction:

The whole signals that appear in the proton decoupled 13C NMR spectrum are singlet in nature. Due to several reasons, the carbon atoms are do not coupled with the adjacent carbon atom. The only condition to form 13C13C bond is that two 13C atoms must be adjacent to each other. It is almost impossible for two 13C nuclei to be adjacent to each other because the presence 13C atoms in nature are less abundant and also the 13C nuclei do not couple with the 12C nuclei because of zero spin quantum number.

Interpretation Introduction

(c)

Interpretation:

The appearance of the high-resolution 13C spectrum of (proton decoupled) acetone is to be stated.

Concept introduction:

The whole signals that appear in the proton decoupled 13C NMR spectrum are singlet in nature. Due to several reasons, the carbon atoms are do not coupled with the adjacent carbon atom. The only condition to form 13C13C bond is that two 13C atoms must be adjacent to each other. It is almost impossible for two 13C nuclei to be adjacent to each other because the presence 13C atoms in nature are less abundant and also the 13C nuclei do not couple with the 12C nuclei because of zero spin quantum number.

Blurred answer
Students have asked these similar questions
Consider the reaction below and answer the following questions. Part 1 of 4 Br NaOCH2CH3 Identify the mechanisms involved. Check all that apply. SN 1 SN 2 E1 E2 None of the above Part 2 of 4 Skip Part Check esc F1 F2 lock 1 2 Q W A S #3 80 F3 F4 F5 F6 Save For © 2025 McGraw Hill LLC. All Rights Reserved. Terms ˇˇ % & 4 5 6 89 7 IK A 分 བ F7 F8 F9 F * E R T Y U 8 9 D F G H K V B N M 0 O
What kind of holes are not generated when solid-state particles adopt a close packing pattern? Group of answer choices tetrahedral cubic octahedral None of the other choices are correct
For the reaction below: 1. Draw all reasonable elimination products to the right of the arrow. 2. In the box below the reaction, redraw any product you expect to be a major product. 田 Major Product: Check ☐ + I Na OH esc F1 F2 2 1 @ 2 Q W tab A caps lock S #3 80 F3 69 4 σ F4 % 95 S Click and drag to sta drawing a structure mm Save For Later 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use GO DII F5 F6 F7 F8 F9 F10 6 CO 89 & 7 LU E R T Y U 8* 9 0 D F G H J K L Z X C V B N M 36
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
  • Text book image
    Principles of Instrumental Analysis
    Chemistry
    ISBN:9781305577213
    Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
    Publisher:Cengage Learning
    Text book image
    Physical Chemistry
    Chemistry
    ISBN:9781133958437
    Author:Ball, David W. (david Warren), BAER, Tomas
    Publisher:Wadsworth Cengage Learning,
    Text book image
    Organic Chemistry: A Guided Inquiry
    Chemistry
    ISBN:9780618974122
    Author:Andrei Straumanis
    Publisher:Cengage Learning
  • Text book image
    Organic Chemistry
    Chemistry
    ISBN:9781305580350
    Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
    Publisher:Cengage Learning
Text book image
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Text book image
Physical Chemistry
Chemistry
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Wadsworth Cengage Learning,
Text book image
Organic Chemistry: A Guided Inquiry
Chemistry
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Cengage Learning
Text book image
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning