In infrared spectroscopy, which functional group would show a strong absorption

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Question: In infrared spectroscopy, which functional group would show a strong absorption around 1700 cm-1?

Options:

Correct Answer: Ketones

Solution:

Ketones typically show a strong absorption around 1700 cm-1 due to the C=O stretching vibration.

In infrared spectroscopy, which functional group would show a strong absorption around 1700 cm-1?

In infrared spectroscopy, which functional group would show a strong absorption around 1700 cm-1?

Step 1: Understand what infrared spectroscopy is. It is a technique used to identify functional groups in molecules based on how they absorb infrared light.
Step 2: Know that different functional groups absorb infrared light at specific wavenumbers (measured in cm-1).
Step 3: Recognize that the carbonyl group (C=O) is a common functional group that absorbs infrared light.
Step 4: Learn that ketones, which contain a carbonyl group, typically show a strong absorption around 1700 cm-1.
Step 5: Conclude that if you see a strong absorption around 1700 cm-1 in an infrared spectrum, it likely indicates the presence of a ketone.

Infrared Spectroscopy – A technique used to identify functional groups in organic compounds based on the absorption of infrared light at specific wavelengths.
C=O Stretching Vibration – The specific vibrational mode of carbonyl groups (C=O) that results in strong absorption in the infrared region, typically around 1700 cm-1.
Functional Groups – Specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.