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A ¹H NMR spectrum is shown for a molecule with the molecular formula of C5H10O2. Draw the structure that best fits this data. 10 apm

A ¹H NMR spectrum is shown for a molecule with the molecular formula of C5H10O2. Draw the structure that best fits this data. 10 apm

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**1H NMR Spectrum Analysis for C₅H₁₀O₂** This image shows a ¹H NMR spectrum for a molecule with the molecular formula C₅H₁₀O₂. **Spectrum Details:** - **Chemical Shifts (δ ppm):** The spectrum displays several peaks, indicating different hydrogen environments within the molecule. - **Peak Analysis:** - **At 1 ppm:** A small peak, likely representing hydrogens in an alkane environment. - **Between 2-3 ppm:** Multiple peaks, indicating hydrogens attached to carbon atoms adjacent to a potential electronegative group. - **Between 3-4 ppm:** A taller peak, typically indicating hydrogen atoms in a more deshielded environment, possibly adjacent to an oxygen atom or in an ester functional group. - **Between 4-5 ppm:** A distinct peak, suggesting the presence of hydrogens in an even more deshielded environment, possibly involving an alkene or additional electronegative groups. - **Integration and Splitting:** The relative area under the peaks corresponds to the number of hydrogens, while any splitting patterns could provide insight into neighboring hydrogen atoms. **Objective:** Using the provided NMR data, students are tasked to draw the structure of a molecule that correlates with the spectrum, considering the chemical shifts, integration, and potential splitting patterns.
Transcribed Image Text:**1H NMR Spectrum Analysis for C₅H₁₀O₂** This image shows a ¹H NMR spectrum for a molecule with the molecular formula C₅H₁₀O₂. **Spectrum Details:** - **Chemical Shifts (δ ppm):** The spectrum displays several peaks, indicating different hydrogen environments within the molecule. - **Peak Analysis:** - **At 1 ppm:** A small peak, likely representing hydrogens in an alkane environment. - **Between 2-3 ppm:** Multiple peaks, indicating hydrogens attached to carbon atoms adjacent to a potential electronegative group. - **Between 3-4 ppm:** A taller peak, typically indicating hydrogen atoms in a more deshielded environment, possibly adjacent to an oxygen atom or in an ester functional group. - **Between 4-5 ppm:** A distinct peak, suggesting the presence of hydrogens in an even more deshielded environment, possibly involving an alkene or additional electronegative groups. - **Integration and Splitting:** The relative area under the peaks corresponds to the number of hydrogens, while any splitting patterns could provide insight into neighboring hydrogen atoms. **Objective:** Using the provided NMR data, students are tasked to draw the structure of a molecule that correlates with the spectrum, considering the chemical shifts, integration, and potential splitting patterns.
The image displays a proton nuclear magnetic resonance (NMR) spectrum, commonly used in organic chemistry for structural analysis. The x-axis represents the chemical shift in parts per million (ppm) ranging from 0 to 12 ppm, while the y-axis shows signal intensity. ### Key Features: 1. **Chemical Shift (ppm):** - Signals appear at approximately 4.2, 3.5, and between 1 and 2 ppm. 2. **Peak Assignments:** - The peak around 4.2 ppm suggests the presence of protons near electronegative atoms, perhaps in an electron-withdrawing environment. - The peak near 3.5 ppm typically indicates protons adjacent to oxygen or nitrogen atoms. - The complex multiplet between 1 and 2 ppm can often be attributed to alkane protons, indicating a typical hydrocarbon backbone in the structure. 3. **Peak Splitting:** - The peaks exhibit splitting patterns (multiplet structures), indicative of coupling with neighboring protons, which provides information regarding the number of adjacent protons. 4. **Integration Curves:** - Orange lines above the peaks represent integration curves, which correspond to the area under each peak. This area is proportional to the number of protons contributing to each signal. This spectrum is instrumental for determining the molecular structure, functional groups, and environment of hydrogen atoms within an organic compound.
Transcribed Image Text:The image displays a proton nuclear magnetic resonance (NMR) spectrum, commonly used in organic chemistry for structural analysis. The x-axis represents the chemical shift in parts per million (ppm) ranging from 0 to 12 ppm, while the y-axis shows signal intensity. ### Key Features: 1. **Chemical Shift (ppm):** - Signals appear at approximately 4.2, 3.5, and between 1 and 2 ppm. 2. **Peak Assignments:** - The peak around 4.2 ppm suggests the presence of protons near electronegative atoms, perhaps in an electron-withdrawing environment. - The peak near 3.5 ppm typically indicates protons adjacent to oxygen or nitrogen atoms. - The complex multiplet between 1 and 2 ppm can often be attributed to alkane protons, indicating a typical hydrocarbon backbone in the structure. 3. **Peak Splitting:** - The peaks exhibit splitting patterns (multiplet structures), indicative of coupling with neighboring protons, which provides information regarding the number of adjacent protons. 4. **Integration Curves:** - Orange lines above the peaks represent integration curves, which correspond to the area under each peak. This area is proportional to the number of protons contributing to each signal. This spectrum is instrumental for determining the molecular structure, functional groups, and environment of hydrogen atoms within an organic compound.
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