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This NMr and IR spectra show the product of an unknown grignard reaction to be 4-methoxy benzoic acid. Does this mean that the Grignard reagent is Methoxyphenylmagnesium bromide? Please include the complete mechanism in the explanation.

This NMr and IR spectra show the product of an unknown grignard reaction to be 4-methoxy benzoic acid. Does this mean that the Grignard reagent is Methoxyphenylmagnesium bromide? Please include the complete mechanism in the explanation.

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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This NMr and IR spectra show the product of an unknown grignard reaction to be 4-methoxy benzoic acid. Does this mean that the Grignard reagent is Methoxyphenylmagnesium bromide? Please include the complete mechanism in the explanation. 

### NMR Spectroscopy Analysis This image presents an NMR (Nuclear Magnetic Resonance) spectrum, typically used to determine the structure of organic compounds. Below is a detailed explanation of the spectrum and the table included on the graph. #### Spectrum Analysis On the spectrum, the x-axis represents the chemical shift in parts per million (PPM), which indicates the environment of protons in the compound. The peaks represent the resonance of hydrogen atoms in different magnetic environments. - **Peak Descriptions**: - **Left Section**: Shows a range of two peaks around 8.082 to 8.055 PPM. - **Middle Section**: Displays two peaks around 7.270 and 6.975 PPM with notable heights, indicating the presence of hydrogen atoms in a slightly different environment. - **Right Section**: Dominated by a significant peak around 3.891 PPM, suggestive of a different set of hydrogen atoms. #### Index Table Explanation The table at the top right lists peaks with specific values: - **INDEX**: Numbering of peaks for reference. - **FREQUENCY**: Exact frequency of the particular hydrogen resonance. - **PPM**: Chemical shift, indicating the electron environment around hydrogen. - **HEIGHT**: Intensity or height of each peak, which can infer the number of equivalent hydrogen atoms. #### Table Details | Index | Frequency | PPM | Height | |-------|-----------|-------|--------| | 1 | 2442.2 | 8.082 | 8.7 | | 2 | 2416.0 | 8.055 | 9.5 | | 3 | 2411.9 | 8.051 | 9.6 | | 4 | 2180.7 | 7.270 | 104.4 | | 5 | 2092.1 | 6.975 | 10.4 | | 6 | 2083.3 | 6.945 | 9.3 | | 7 | 1168.3 | 3.895 | 37.4 | | 8 | 1167.2 | 3.891 | 42.4 | #### Key Insights - The largest peak at 7.
Transcribed Image Text:### NMR Spectroscopy Analysis This image presents an NMR (Nuclear Magnetic Resonance) spectrum, typically used to determine the structure of organic compounds. Below is a detailed explanation of the spectrum and the table included on the graph. #### Spectrum Analysis On the spectrum, the x-axis represents the chemical shift in parts per million (PPM), which indicates the environment of protons in the compound. The peaks represent the resonance of hydrogen atoms in different magnetic environments. - **Peak Descriptions**: - **Left Section**: Shows a range of two peaks around 8.082 to 8.055 PPM. - **Middle Section**: Displays two peaks around 7.270 and 6.975 PPM with notable heights, indicating the presence of hydrogen atoms in a slightly different environment. - **Right Section**: Dominated by a significant peak around 3.891 PPM, suggestive of a different set of hydrogen atoms. #### Index Table Explanation The table at the top right lists peaks with specific values: - **INDEX**: Numbering of peaks for reference. - **FREQUENCY**: Exact frequency of the particular hydrogen resonance. - **PPM**: Chemical shift, indicating the electron environment around hydrogen. - **HEIGHT**: Intensity or height of each peak, which can infer the number of equivalent hydrogen atoms. #### Table Details | Index | Frequency | PPM | Height | |-------|-----------|-------|--------| | 1 | 2442.2 | 8.082 | 8.7 | | 2 | 2416.0 | 8.055 | 9.5 | | 3 | 2411.9 | 8.051 | 9.6 | | 4 | 2180.7 | 7.270 | 104.4 | | 5 | 2092.1 | 6.975 | 10.4 | | 6 | 2083.3 | 6.945 | 9.3 | | 7 | 1168.3 | 3.895 | 37.4 | | 8 | 1167.2 | 3.891 | 42.4 | #### Key Insights - The largest peak at 7.
**Infrared Spectroscopy Analysis** The graph above is an infrared (IR) spectrum, commonly used in analytical chemistry to identify molecular structures. The x-axis represents the wavenumber in \( \text{cm}^{-1} \), ranging from 650 to 4000 \( \text{cm}^{-1} \). The y-axis shows the percentage of transmittance (%T) from 0 to 105. **Key Features and Peaks:** 1. **Wavenumber Peaks:** - **2842.94 \( \text{cm}^{-1} \)** and **2546.11 \( \text{cm}^{-1} \):** These peaks indicate C-H stretching, typically associated with alkanes. - **1922.94 \( \text{cm}^{-1} \):** Less common, potentially indicating C≡C or C≡N bonds. - **1677.35 to 1466.06 \( \text{cm}^{-1} \):** These peaks often represent C=C stretching or other carbon-heteroatom vibrations. - **1324.45 to 1259.01 \( \text{cm}^{-1} \):** Associated with C-H bending or deformation. - **1166.50 to 653.08 \( \text{cm}^{-1} \):** These peaks are often due to C-O, C-N stretching, or out-of-plane bending in aromatics. 2. **Graph Explanation:** - The spectrum is characterized by multiple peaks, each corresponding to different bond vibrations within a molecule. - The transmittance decreases when absorption occurs, leading to distinct peaks in the spectrum. - Higher wavenumbers generally represent stronger bonds (e.g., O-H, N-H), while lower wavenumbers reflect weaker bonds (e.g., C-C). This spectrum is crucial for identifying functional groups in organic compounds, helping to elucidate their structures based on the absorption patterns.
Transcribed Image Text:**Infrared Spectroscopy Analysis** The graph above is an infrared (IR) spectrum, commonly used in analytical chemistry to identify molecular structures. The x-axis represents the wavenumber in \( \text{cm}^{-1} \), ranging from 650 to 4000 \( \text{cm}^{-1} \). The y-axis shows the percentage of transmittance (%T) from 0 to 105. **Key Features and Peaks:** 1. **Wavenumber Peaks:** - **2842.94 \( \text{cm}^{-1} \)** and **2546.11 \( \text{cm}^{-1} \):** These peaks indicate C-H stretching, typically associated with alkanes. - **1922.94 \( \text{cm}^{-1} \):** Less common, potentially indicating C≡C or C≡N bonds. - **1677.35 to 1466.06 \( \text{cm}^{-1} \):** These peaks often represent C=C stretching or other carbon-heteroatom vibrations. - **1324.45 to 1259.01 \( \text{cm}^{-1} \):** Associated with C-H bending or deformation. - **1166.50 to 653.08 \( \text{cm}^{-1} \):** These peaks are often due to C-O, C-N stretching, or out-of-plane bending in aromatics. 2. **Graph Explanation:** - The spectrum is characterized by multiple peaks, each corresponding to different bond vibrations within a molecule. - The transmittance decreases when absorption occurs, leading to distinct peaks in the spectrum. - Higher wavenumbers generally represent stronger bonds (e.g., O-H, N-H), while lower wavenumbers reflect weaker bonds (e.g., C-C). This spectrum is crucial for identifying functional groups in organic compounds, helping to elucidate their structures based on the absorption patterns.
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