6. Analyze the two IR’s below. One corresponds to 2,3-dimethyl-1-butene, and the other corresponds to 2,3-dimethyl-2-butene. a. Draw the structures of both molecules. b. Match each compound to the correct spectrum. c. Explain how you arrived at your selection. In your explanation you should state at least two reasons (e.g. peaks that are missing/present, strong vs weak, symmetry vs. asymmetry) and you should support your reasons with data from the IR spectra.

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6. Analyze the two IR’s below. One corresponds to 2,3-dimethyl-1-butene, and the other corresponds
to 2,3-dimethyl-2-butene.
a. Draw the structures of both molecules.
b. Match each compound to the correct spectrum.
c. Explain how you arrived at your selection. In your explanation you should state at least two
reasons (e.g. peaks that are missing/present, strong vs weak, symmetry vs. asymmetry) and
you should support your reasons with data from the IR spectra.

The image contains two infrared (IR) spectroscopy graphs for a compound represented by the molecular formula C\(_6\)H\(_{12}\).

**Graph Analysis:**

1. **X-Axis (Wavenumber cm\(^{-1}\)):** 
   - The x-axis displays the wavenumber range from approximately 4000 to 500 cm\(^{-1}\). This range is typical for IR spectroscopy, indicating the frequencies at which the molecule absorbs infrared light.

2. **Y-Axis (Transmittance %):**
   - The y-axis represents transmittance, ranging from 0 to 100%. A value closer to 100% indicates that most of the infrared light passes through the sample, while a lower value signals greater absorption at that particular wavenumber.

3. **Spectral Features:**
   - Both graphs exhibit multiple peaks at specific wavenumbers. These peaks correspond to the vibrational modes of functional groups present in the compound.
   - Notable absorption bands can be seen around the following wavenumbers:
     - ~3000 cm\(^{-1}\): Typically associated with C-H stretching in alkane, alkene, or aromatic compounds.
     - ~1600 cm\(^{-1}\): This region often indicates C=C stretching, which might suggest the presence of double bonds.
     - ~1000-1500 cm\(^{-1}\): These bands may relate to C-C, C-O, or C-N stretching vibrations.

4. **Comparison Between Spectra:**
   - Both spectra display similar features indicative of the same compound, but the peaks may have slight variations in intensity or position due to differences in experimental conditions or sample preparation.

**Conclusion:**

These IR spectra likely represent an analysis of the same compound, C\(_6\)H\(_{12}\), ensuring consistency in fingerprint regions and functional group identification. Interpreting these graphs can provide insights into the molecular structure and functional groups present in the compound.
Transcribed Image Text:The image contains two infrared (IR) spectroscopy graphs for a compound represented by the molecular formula C\(_6\)H\(_{12}\). **Graph Analysis:** 1. **X-Axis (Wavenumber cm\(^{-1}\)):** - The x-axis displays the wavenumber range from approximately 4000 to 500 cm\(^{-1}\). This range is typical for IR spectroscopy, indicating the frequencies at which the molecule absorbs infrared light. 2. **Y-Axis (Transmittance %):** - The y-axis represents transmittance, ranging from 0 to 100%. A value closer to 100% indicates that most of the infrared light passes through the sample, while a lower value signals greater absorption at that particular wavenumber. 3. **Spectral Features:** - Both graphs exhibit multiple peaks at specific wavenumbers. These peaks correspond to the vibrational modes of functional groups present in the compound. - Notable absorption bands can be seen around the following wavenumbers: - ~3000 cm\(^{-1}\): Typically associated with C-H stretching in alkane, alkene, or aromatic compounds. - ~1600 cm\(^{-1}\): This region often indicates C=C stretching, which might suggest the presence of double bonds. - ~1000-1500 cm\(^{-1}\): These bands may relate to C-C, C-O, or C-N stretching vibrations. 4. **Comparison Between Spectra:** - Both spectra display similar features indicative of the same compound, but the peaks may have slight variations in intensity or position due to differences in experimental conditions or sample preparation. **Conclusion:** These IR spectra likely represent an analysis of the same compound, C\(_6\)H\(_{12}\), ensuring consistency in fingerprint regions and functional group identification. Interpreting these graphs can provide insights into the molecular structure and functional groups present in the compound.
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