280 8 8.055 8.051 8 1.90 270 6.975 6.945 7 ] 1.98 6 5 T T -3.895 4 T68 E 3.00 INDEX 1 2 3 4 5 6 7 8 3 FREQUENCY PPM 2424.2 2416.0 2414.9 2180.7 2092.1 2083.3 1168.3 1167.2 2 8.082 8.055 8.051 7.270 6.975 6.945 3.895 3.891 HEIGHT 8.7 9.5 9.6 104.4 10.4 9.3 1 37.4 42.4

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Is this HNMR spectrum for 3-methoxybenzoic acid, 4 methoxybenzoic acid or 4 methylbenzoic acid? Please explain why and explain peaks, shifts, etc. 

This image shows a nuclear magnetic resonance (NMR) spectrum, which is used to determine the structure of organic compounds. The x-axis represents the chemical shift in parts per million (ppm), a measure of the resonance frequency of nuclei in a magnetic field. The y-axis represents the signal intensity, related to the number of resonating nuclei.

### Key Features of the Spectrum:

1. **Peaks**:
   - There are several peaks displayed along the spectrum, each corresponding to different chemical environments of hydrogen atoms (protons) in the sample.
   - The largest peak is at approximately 7.270 ppm, indicating a higher concentration or specific environment with many similar hydrogen atoms.

2. **Table Information**:
   - The table at the top right provides data with columns labeled: Index, Frequency, PPM, and Height.
   - **Index**: Numerical labels for each peak.
   - **Frequency**: Corresponds to the resonance frequency of each peak.
   - **PPM**: Lists the chemical shift for each peak, indicating their position on the x-axis.
   - **Height**: Indicates the intensity of each peak.

### Detailed Table Data:
- **Index 1:** Frequency 2442.2, PPM 8.022, Height 8.7
- **Index 2:** Frequency 2416.0, PPM 8.055, Height 9.5
- **Index 3:** Frequency 2411.9, PPM 8.051, Height 9.6
- **Index 4:** Frequency 2180.7, PPM 7.270, Height 104.4
- **Index 5:** Frequency 2092.1, PPM 6.975, Height 10.4
- **Index 6:** Frequency 2083.3, PPM 6.945, Height 9.3
- **Index 7:** Frequency 1168.3, PPM 3.895, Height 37.4
- **Index 8:** Frequency 1167.2, PPM 3.891, Height 42.4

### Interpretation:
- Peaks at higher ppm typically indicate protons in environments with deshielding effects, such as those near electronegative atoms or in aromatic rings.
- The peak height provides information about the number of protons contributing to that signal, assisting in deducing
Transcribed Image Text:This image shows a nuclear magnetic resonance (NMR) spectrum, which is used to determine the structure of organic compounds. The x-axis represents the chemical shift in parts per million (ppm), a measure of the resonance frequency of nuclei in a magnetic field. The y-axis represents the signal intensity, related to the number of resonating nuclei. ### Key Features of the Spectrum: 1. **Peaks**: - There are several peaks displayed along the spectrum, each corresponding to different chemical environments of hydrogen atoms (protons) in the sample. - The largest peak is at approximately 7.270 ppm, indicating a higher concentration or specific environment with many similar hydrogen atoms. 2. **Table Information**: - The table at the top right provides data with columns labeled: Index, Frequency, PPM, and Height. - **Index**: Numerical labels for each peak. - **Frequency**: Corresponds to the resonance frequency of each peak. - **PPM**: Lists the chemical shift for each peak, indicating their position on the x-axis. - **Height**: Indicates the intensity of each peak. ### Detailed Table Data: - **Index 1:** Frequency 2442.2, PPM 8.022, Height 8.7 - **Index 2:** Frequency 2416.0, PPM 8.055, Height 9.5 - **Index 3:** Frequency 2411.9, PPM 8.051, Height 9.6 - **Index 4:** Frequency 2180.7, PPM 7.270, Height 104.4 - **Index 5:** Frequency 2092.1, PPM 6.975, Height 10.4 - **Index 6:** Frequency 2083.3, PPM 6.945, Height 9.3 - **Index 7:** Frequency 1168.3, PPM 3.895, Height 37.4 - **Index 8:** Frequency 1167.2, PPM 3.891, Height 42.4 ### Interpretation: - Peaks at higher ppm typically indicate protons in environments with deshielding effects, such as those near electronegative atoms or in aromatic rings. - The peak height provides information about the number of protons contributing to that signal, assisting in deducing
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