Textbook Question
For the following molecules, give the integration you would expect for the signal associated with the hydrogens at the labeled carbons. [Pay attention to the symmetry, or lack of symmetry, in the molecules.]
(f)
1
views
Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases: Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Not the one you use?Change textbook
All textbooks
Mullins 1st EditionCh. 15 - Structural Identification II: Nuclear Magnetic Resonance SpectroscopyProblem 58c
Mullins 1st EditionCh. 15 - Structural Identification II: Nuclear Magnetic Resonance SpectroscopyProblem 58cChapter 14, Problem 58c
For the following molecules, give the integration you would expect for the signal associated with the hydrogens at the labeled carbons. [Pay attention to the symmetry, or lack of symmetry, in the molecules.]
(c) 
Verified step by step guidance1
Identify the labeled carbons in the molecule. These are the carbons whose hydrogen signals you need to analyze.
Determine the number of hydrogen atoms attached to each labeled carbon. This will directly affect the integration of the NMR signal.
Examine the symmetry of the molecule. Symmetrical molecules may have equivalent hydrogens, which can simplify the integration process.
Consider the chemical environment of the hydrogens. Hydrogens in similar environments will have similar chemical shifts and may be integrated together.
Calculate the integration values based on the number of hydrogens at each labeled carbon. The integration is proportional to the number of hydrogens contributing to the signal.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
NMR Spectroscopy
Nuclear Magnetic Resonance (NMR) Spectroscopy is a technique used to determine the structure of organic compounds by observing the magnetic properties of certain atomic nuclei. In NMR, the integration of signals corresponds to the relative number of hydrogen atoms contributing to each signal, providing insight into the molecular structure and symmetry.
Recommended video:
Guided course
10:06
General NMR Features
Integration in NMR
Integration in NMR refers to the area under the peaks in an NMR spectrum, which is proportional to the number of hydrogen atoms that produce each signal. This allows chemists to determine the ratio of different types of hydrogen atoms in a molecule, which is crucial for deducing the structure and understanding the symmetry of the molecule.
Recommended video:
Guided course
06:461H NMR Integration
Molecular Symmetry
Molecular symmetry involves the spatial arrangement of atoms in a molecule that results in equivalent environments for certain atoms or groups. Symmetry affects the NMR signals by potentially reducing the number of unique signals observed, as equivalent hydrogens will produce the same signal, simplifying the analysis of the spectrum.
Recommended video:
Guided course
00:25Determining Chirality with Plane of Symmetry
Related Practice
Textbook Question
How many distinct signals would you expect to see in the ¹H NMR spectrum of the following molecules? [Ignore diastereotopic hydrogens for the sake of this assessment.]
(c)
2
views
Textbook Question
For the following molecules, give the integration you would expect for the signal associated with the hydrogens at the labeled carbons. [Pay attention to the symmetry, or lack of symmetry, in the molecules.]
(e)
1
views
Textbook Question
How many distinct signals would you expect to see in the ¹H NMR spectrum of the following molecules? [Ignore diastereotopic hydrogens for the sake of this assessment.]
(f)
2
views
Textbook Question
For the following molecules, give the chemical shift for each indicated hydrogen.
(b)
1
views
Textbook Question
How many distinct signals would you expect to see in the ¹H NMR spectrum of the following molecules? [Ignore diastereotopic hydrogens for the sake of this assessment.]
(b)
2
views