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13: C₂H₁1C1 100 4888 8.0 5H 7.5 7.0 6.5 6.0 PPM. 2508 se ceoT 2H 134.51 $290.54 2H 2H 4.0 3.8 3.6 3.4 3.2 3.6 2.8 2.8 2.4 2.2 2.0 PPM 1000 864.22 744.62 652.82 25

13: C₂H₁1C1 100 4888 8.0 5H 7.5 7.0 6.5 6.0 PPM. 2508 se ceoT 2H 134.51 $290.54 2H 2H 4.0 3.8 3.6 3.4 3.2 3.6 2.8 2.8 2.4 2.2 2.0 PPM 1000 864.22 744.62 652.82 25

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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Hi I am a bit confused would like some help. First attachment is just an example, the actual problem I would like help for is C9H11Cl

# NMR Spectrum Analysis Guide To analyze each problem effectively, you must complete the following steps: 1. **Calculate the Degree of Unsaturation:** - Determine the number of unsaturated bonds or rings in the compound. 2. **Assign the Principal IR Absorption Bands Above 1500 cm⁻¹:** - Identify the functional groups present within the compound based on IR spectroscopy. 3. **Draw the Structure of the Compound:** - Sketch the molecular structure accurately. 4. **Label the Protons on Your Structure with Letters and Assign Them to Peaks on the NMR Spectrum:** - Use letters to label different hydrogen environments in the molecule. - Correlate these labels with corresponding peaks observed in the NMR spectrum. ### Example: The given diagram features an example of a chemical compound and its corresponding NMR spectrum. #### NMR Spectrum Explanation: - **Peak A (1.0 ppm, 3H):** - This peak corresponds to the protons labeled "A" on the compound structure. - The area under this peak indicates 3 protons (3H), suggesting they are likely part of a methyl group. - **Peak B (1.5 ppm, 2H):** - Protons labeled "B" correlate with this peak. - With two protons (2H), this peak may represent a CH₂ group adjacent to other groups affecting its chemical shift. - **Peak C (3.5 ppm, 2H):** - Peak "C" is linked to two protons (2H), indicating a different environment from peak B, often corresponding to a -CH₂- group near an electronegative atom like oxygen. - **Peak D (2.5 ppm, 1H):** - The proton labeled "D" matches this peak. - As it represents a single proton (1H), it may be near a functional group impacting its shift differently from other hydrogens. ### Molecule Structure: The structure provided in the diagram includes labels for protons (A, B, C, D) on different parts of the chemical structure: - **A (3H)**: Possibly a methyl group. - **B (2H)**: Likely a methylene group. - **C (2H)**: Another methylene group. - **D (1H)**: Hydrogen attached to a specific functional group or part of the
Transcribed Image Text:# NMR Spectrum Analysis Guide To analyze each problem effectively, you must complete the following steps: 1. **Calculate the Degree of Unsaturation:** - Determine the number of unsaturated bonds or rings in the compound. 2. **Assign the Principal IR Absorption Bands Above 1500 cm⁻¹:** - Identify the functional groups present within the compound based on IR spectroscopy. 3. **Draw the Structure of the Compound:** - Sketch the molecular structure accurately. 4. **Label the Protons on Your Structure with Letters and Assign Them to Peaks on the NMR Spectrum:** - Use letters to label different hydrogen environments in the molecule. - Correlate these labels with corresponding peaks observed in the NMR spectrum. ### Example: The given diagram features an example of a chemical compound and its corresponding NMR spectrum. #### NMR Spectrum Explanation: - **Peak A (1.0 ppm, 3H):** - This peak corresponds to the protons labeled "A" on the compound structure. - The area under this peak indicates 3 protons (3H), suggesting they are likely part of a methyl group. - **Peak B (1.5 ppm, 2H):** - Protons labeled "B" correlate with this peak. - With two protons (2H), this peak may represent a CH₂ group adjacent to other groups affecting its chemical shift. - **Peak C (3.5 ppm, 2H):** - Peak "C" is linked to two protons (2H), indicating a different environment from peak B, often corresponding to a -CH₂- group near an electronegative atom like oxygen. - **Peak D (2.5 ppm, 1H):** - The proton labeled "D" matches this peak. - As it represents a single proton (1H), it may be near a functional group impacting its shift differently from other hydrogens. ### Molecule Structure: The structure provided in the diagram includes labels for protons (A, B, C, D) on different parts of the chemical structure: - **A (3H)**: Possibly a methyl group. - **B (2H)**: Likely a methylene group. - **C (2H)**: Another methylene group. - **D (1H)**: Hydrogen attached to a specific functional group or part of the
### Chemical Analysis of Compound: C<sub>9</sub>H<sub>11</sub>Cl #### Infrared (IR) Spectrum Analysis The graph on the top represents the IR spectrum of the compound C<sub>9</sub>H<sub>11</sub>Cl. The x-axis represents the wavenumber in cm⁻¹, ranging from 4000 cm⁻¹ to 600 cm⁻¹. The y-axis represents the transmittance percentage. Key absorption peaks are observed at the following wavenumbers: - **3084.35 cm⁻¹** and **3062.73 cm⁻¹**: These peaks typically indicate the presence of C-H stretching vibrations in an aromatic ring. - **2968.61 cm⁻¹** and **2927.25 cm⁻¹**: These peaks correspond to aliphatic C-H stretching vibrations. - **1601.45 cm⁻¹**: This peak is characteristic of C=C stretching vibrations in an aromatic system. - **1251.37 cm⁻¹**: This peak likely represents C-Cl stretching. - **822.12 cm⁻¹** and **684.22 cm⁻¹**: These peaks often indicate C-H out-of-plane bending in aromatic compounds. - **745.82 cm⁻¹** and **700.25 cm⁻¹**: Usually associated with aromatic ring vibrations. #### Nuclear Magnetic Resonance (NMR) Spectrum Analysis The bottom part of the image shows the NMR spectrum of the compound. The x-axis represents the chemical shift (δ) in parts per million (PPM), while the y-axis represents the signal intensity. Key signals (peaks) are observed at the following chemical shifts: - **7.5 to 6.5 PPM**: A multiplet peak corresponding to the aromatic protons (designated as 5H). - **3.3 to 3.4 PPM**: A doublet peak corresponding to 2 protons (2H). - **3.0 to 3.2 PPM**: Another doublet peak corresponding to 2 protons (2H). - **2.2 to 2.3 PPM**: A triplet peak indicating 2 protons (2H). By analyzing these spectra, we can infer the presence of aromatic rings, aliphatic groups
Transcribed Image Text:### Chemical Analysis of Compound: C<sub>9</sub>H<sub>11</sub>Cl #### Infrared (IR) Spectrum Analysis The graph on the top represents the IR spectrum of the compound C<sub>9</sub>H<sub>11</sub>Cl. The x-axis represents the wavenumber in cm⁻¹, ranging from 4000 cm⁻¹ to 600 cm⁻¹. The y-axis represents the transmittance percentage. Key absorption peaks are observed at the following wavenumbers: - **3084.35 cm⁻¹** and **3062.73 cm⁻¹**: These peaks typically indicate the presence of C-H stretching vibrations in an aromatic ring. - **2968.61 cm⁻¹** and **2927.25 cm⁻¹**: These peaks correspond to aliphatic C-H stretching vibrations. - **1601.45 cm⁻¹**: This peak is characteristic of C=C stretching vibrations in an aromatic system. - **1251.37 cm⁻¹**: This peak likely represents C-Cl stretching. - **822.12 cm⁻¹** and **684.22 cm⁻¹**: These peaks often indicate C-H out-of-plane bending in aromatic compounds. - **745.82 cm⁻¹** and **700.25 cm⁻¹**: Usually associated with aromatic ring vibrations. #### Nuclear Magnetic Resonance (NMR) Spectrum Analysis The bottom part of the image shows the NMR spectrum of the compound. The x-axis represents the chemical shift (δ) in parts per million (PPM), while the y-axis represents the signal intensity. Key signals (peaks) are observed at the following chemical shifts: - **7.5 to 6.5 PPM**: A multiplet peak corresponding to the aromatic protons (designated as 5H). - **3.3 to 3.4 PPM**: A doublet peak corresponding to 2 protons (2H). - **3.0 to 3.2 PPM**: Another doublet peak corresponding to 2 protons (2H). - **2.2 to 2.3 PPM**: A triplet peak indicating 2 protons (2H). By analyzing these spectra, we can infer the presence of aromatic rings, aliphatic groups
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