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13.15 Give the splitting pattern expected for the indicated ¹H-NMR signal.

13.15 Give the splitting pattern expected for the indicated ¹H-NMR signal.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Give the splitting pattern expected for the indicated H-NMR signal.

The image contains the following text: "13.15 Give the splitting pattern expected for the indicated ¹H-NMR signal." Below the text is a chemical structure featuring a four-carbon straight chain with a carbonyl group (C=O) bonded between the second and third carbons. A cyclopentane ring is attached to the third carbon. An arrow points to the first carbon in the chain, indicating where the ¹H-NMR splitting pattern should be analyzed. ### Explanation for Educational Context: The structure is an acyclic ketone with a cyclopentane ring. The ¹H-NMR splitting pattern for the hydrogen atoms on the first carbon, where the arrow is pointing, needs to be determined. In analyzing this: 1. **Adjacent Hydrogen Atoms**: The carbon adjacent to the first carbon (C₂, to which the carbonyl and cyclopentane are attached) has two hydrogen atoms. 2. **Splitting Pattern**: Based on the n+1 rule in NMR spectroscopy, where "n" is the number of hydrogens on adjacent carbons, the expected splitting pattern is a triplet (n=2 splittings, so n+1=3). This exercise illustrates how substituents and adjacent groups influence the splitting of signals in NMR spectroscopy.
Transcribed Image Text:The image contains the following text: "13.15 Give the splitting pattern expected for the indicated ¹H-NMR signal." Below the text is a chemical structure featuring a four-carbon straight chain with a carbonyl group (C=O) bonded between the second and third carbons. A cyclopentane ring is attached to the third carbon. An arrow points to the first carbon in the chain, indicating where the ¹H-NMR splitting pattern should be analyzed. ### Explanation for Educational Context: The structure is an acyclic ketone with a cyclopentane ring. The ¹H-NMR splitting pattern for the hydrogen atoms on the first carbon, where the arrow is pointing, needs to be determined. In analyzing this: 1. **Adjacent Hydrogen Atoms**: The carbon adjacent to the first carbon (C₂, to which the carbonyl and cyclopentane are attached) has two hydrogen atoms. 2. **Splitting Pattern**: Based on the n+1 rule in NMR spectroscopy, where "n" is the number of hydrogens on adjacent carbons, the expected splitting pattern is a triplet (n=2 splittings, so n+1=3). This exercise illustrates how substituents and adjacent groups influence the splitting of signals in NMR spectroscopy.
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1H NMR is a technique by which structure of organic compounds are determined. Chemically equivalent proton gives one signal while chemically different protons gives different signals.

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