Problem #2: Unknown molecule with molecular formula C H₁₂O. 12 Which of these molecules best corresponds to the IR spectrum below? a) 0.8 0.6 0.4 0.2 I OH b) 3000 c) C6H₁2O 12 2000 d) Wavenumber (cm-1) e) НО. www 1000

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**Problem #2**: Unknown molecule with molecular formula C₆H₁₂O.

*Question*: Which of these molecules best corresponds to the IR spectrum below?

Options:
a) Cyclohexanol
b) Ethoxyethane
c) 1,3-Dioxane
d) Hexanal
e) 3-Hexanol

**IR Spectrum Analysis**: 

The infrared (IR) spectrum provided displays absorbance on the y-axis and wavenumber (cm⁻¹) on the x-axis. This spectrum is characteristic of the molecule C₆H₁₂O. 

Key features to note in the IR spectrum:
- A broad peak around 3300 cm⁻¹ could indicate an O-H stretch, typical of alcohols.
- Peaks in the region of 2900 cm⁻¹ typically represent C-H stretching in alkanes.
- The absence of a strong peak near 1700 cm⁻¹ suggests a lack of a carbonyl (C=O) group, which is present in aldehydes and ketones.

By examining these features, one should be able to identify the most appropriate molecular structure that matches the given IR spectrum.
Transcribed Image Text:**Problem #2**: Unknown molecule with molecular formula C₆H₁₂O. *Question*: Which of these molecules best corresponds to the IR spectrum below? Options: a) Cyclohexanol b) Ethoxyethane c) 1,3-Dioxane d) Hexanal e) 3-Hexanol **IR Spectrum Analysis**: The infrared (IR) spectrum provided displays absorbance on the y-axis and wavenumber (cm⁻¹) on the x-axis. This spectrum is characteristic of the molecule C₆H₁₂O. Key features to note in the IR spectrum: - A broad peak around 3300 cm⁻¹ could indicate an O-H stretch, typical of alcohols. - Peaks in the region of 2900 cm⁻¹ typically represent C-H stretching in alkanes. - The absence of a strong peak near 1700 cm⁻¹ suggests a lack of a carbonyl (C=O) group, which is present in aldehydes and ketones. By examining these features, one should be able to identify the most appropriate molecular structure that matches the given IR spectrum.
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Step 1: Determination of index of hydrogen deficiency from molecular formula

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