9 8 OCH3CN O CH₂Cl₂ °Ō OCHCI3 VL 7 16 5 4 3 2 1 O

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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### Identifying a Compound Using 1H NMR Spectrum

A compound has the \(^1H\) NMR spectrum shown below. Identify the compound.

#### NMR Spectrum Analysis

The provided spectrum has a single peak at approximately 2.0 ppm.

#### Spectrum Details:

- **Horizontal Axis (ppm scale)**: The chemical shift values range from 0 to 10 ppm.
- **Vertical Axis (Relative Intensity)**: Represents the intensity of the signal at different chemical shifts.

The sharp, single peak at 2.0 ppm indicates the presence of hydrogen atoms in the same electronic environment.

#### Possible Compounds:

1. **CH₃CN (Acetonitrile)**
2. **CH₂Cl₂ (Dichloromethane)**
3. **Benzene**
4. **CHCl₃ (Chloroform)**

#### Conclusion:

Examining the NMR spectrum and the chemical shift at 2.0 ppm, which is characteristic of a methyl group adjacent to a nitrile group (CH₃CN), we can identify the compound as \( \text{CH}_3\text{CN} \) (Acetonitrile).

This analysis demonstrates the utility of \(^1H\) NMR spectroscopy in determining molecular structure through chemical shift analysis and peak interpretation.
Transcribed Image Text:### Identifying a Compound Using 1H NMR Spectrum A compound has the \(^1H\) NMR spectrum shown below. Identify the compound. #### NMR Spectrum Analysis The provided spectrum has a single peak at approximately 2.0 ppm. #### Spectrum Details: - **Horizontal Axis (ppm scale)**: The chemical shift values range from 0 to 10 ppm. - **Vertical Axis (Relative Intensity)**: Represents the intensity of the signal at different chemical shifts. The sharp, single peak at 2.0 ppm indicates the presence of hydrogen atoms in the same electronic environment. #### Possible Compounds: 1. **CH₃CN (Acetonitrile)** 2. **CH₂Cl₂ (Dichloromethane)** 3. **Benzene** 4. **CHCl₃ (Chloroform)** #### Conclusion: Examining the NMR spectrum and the chemical shift at 2.0 ppm, which is characteristic of a methyl group adjacent to a nitrile group (CH₃CN), we can identify the compound as \( \text{CH}_3\text{CN} \) (Acetonitrile). This analysis demonstrates the utility of \(^1H\) NMR spectroscopy in determining molecular structure through chemical shift analysis and peak interpretation.
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