Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question

For each of the spectra shown, (a) Calculate the degree of unsaturation and (b) Indicate what information is obtained from each signal and (c) propose a structure.

 

### Spectra 9: C<sub>6</sub>H<sub>14</sub>O This image displays the proton NMR spectrum of the molecular compound C<sub>6</sub>H<sub>14</sub>O. Here’s a detailed breakdown of the spectrum: #### Chemical Shift (in ppm): - **1H at ~3.5 ppm:** This peak corresponds to the hydrogen atoms near the oxygen atom, typically indicating an alcohol or ether group. - **1H (adjacent note):** Indicates methylene protons adjacent to chiral centers, suggesting nonequivalence due to the presence of chirality. This detail is critical for understanding the molecule's structure. - **Cluster of Peaks:** - **1H at ~1.5 ppm:** Several peaks indicate the presence of methylene groups, likely representing protons in a carbon chain. - **Multiple 1H Signals:** These are further overlapping signals suggesting various environments for protons along the carbon chain. - **3H at ~1.0 ppm:** This likely corresponds to a methyl group (CH<sub>3</sub>), which often appears upstream in the spectrum at this region. - **6H at ~0.9 ppm:** Represents two equivalent methyl groups, likely indicating a symmetrical or similar environment. ### Additional Notes: - The notation and integral values suggest the relative amount of hydrogen in each environment. Peaks correspond to different types of hydrogen in the molecule, which further assist with deducing its structure. - The spectrum provides insights into the molecule's structure by the number of peaks, their chemical shifts, and their splitting patterns. These factors indicate how hydrogen atoms are chemically and spatially arranged.
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Transcribed Image Text:### Spectra 9: C<sub>6</sub>H<sub>14</sub>O This image displays the proton NMR spectrum of the molecular compound C<sub>6</sub>H<sub>14</sub>O. Here’s a detailed breakdown of the spectrum: #### Chemical Shift (in ppm): - **1H at ~3.5 ppm:** This peak corresponds to the hydrogen atoms near the oxygen atom, typically indicating an alcohol or ether group. - **1H (adjacent note):** Indicates methylene protons adjacent to chiral centers, suggesting nonequivalence due to the presence of chirality. This detail is critical for understanding the molecule's structure. - **Cluster of Peaks:** - **1H at ~1.5 ppm:** Several peaks indicate the presence of methylene groups, likely representing protons in a carbon chain. - **Multiple 1H Signals:** These are further overlapping signals suggesting various environments for protons along the carbon chain. - **3H at ~1.0 ppm:** This likely corresponds to a methyl group (CH<sub>3</sub>), which often appears upstream in the spectrum at this region. - **6H at ~0.9 ppm:** Represents two equivalent methyl groups, likely indicating a symmetrical or similar environment. ### Additional Notes: - The notation and integral values suggest the relative amount of hydrogen in each environment. Peaks correspond to different types of hydrogen in the molecule, which further assist with deducing its structure. - The spectrum provides insights into the molecule's structure by the number of peaks, their chemical shifts, and their splitting patterns. These factors indicate how hydrogen atoms are chemically and spatially arranged.
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