Which Compound Matches The IR Spectrum? Dipropyl Ether Cyclohexane 1, 5-Hexadiene 3-Hexanol 1-Hexen-3-Ol Trans-4-Octene 1-Methylcyclopentene
The Correct Answer and Explanation is :
To determine which compound matches the IR spectrum, we need to analyze the specific functional groups and bonds present in the spectrum and match them to the corresponding compounds. Since I cannot directly view the image you provided, I will guide you through how to identify the compound based on a typical IR spectrum and its features.
In an IR spectrum, you typically observe the following key regions:
- Stretching Frequencies:
- O-H Stretch (Alcohols, Phenols): A broad, strong peak around 3200-3550 cm⁻¹.
- C-H Stretch (Alkanes): A sharp peak around 2800-3000 cm⁻¹.
- C=O Stretch (Carbonyl compounds): Strong peak near 1700 cm⁻¹.
- C=C Stretch (Alkenes): A weak to moderate peak near 1600 cm⁻¹.
- Fingerprint Region: This is typically from 600-1400 cm⁻¹, where many individual compounds have unique absorptions.
Now, let’s evaluate the compounds in the list based on these features:
- Dipropyl Ether: The key features are the C-H stretch around 2800 cm⁻¹ and the ether group, which would give a C-O stretch around 1050 cm⁻¹.
- Cyclohexane: Cyclohexane will have typical alkane C-H stretches around 2900 cm⁻¹ and might show no significant functional group absorption.
- 1,5-Hexadiene: This compound will show alkene C-H stretches and a C=C stretch around 1600 cm⁻¹.
- 3-Hexanol: This will show an O-H stretch (broad around 3300 cm⁻¹) and a C-H stretch from the alkane region.
- 1-Hexen-3-Ol: Like 3-hexanol, it would show both an O-H stretch and a C=C stretch around 1600 cm⁻¹.
- Trans-4-Octene: Will show a C=C stretch and typical alkene stretches, likely in the 1600 cm⁻¹ region.
- 1-Methylcyclopentene: This compound will show an alkene stretch and C-H stretches, likely with the characteristic C=C peak around 1600 cm⁻¹.
Based on the characteristics of the IR spectrum you described (assuming the spectrum includes a broad O-H stretch and a C=C stretch), 3-Hexanol or 1-Hexen-3-Ol would be the most likely matches, as both contain both an alcohol group and an alkene, showing distinct IR absorptions for those functional groups.
If you’d like me to generate an IR spectrum image for one of the compounds or clarify any points, let me know!