In IR spectroscopy, which functional group typically shows a strong absorption a

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Question: In IR spectroscopy, which functional group typically shows a strong absorption around 1700 cm-1?

Options:

Correct Answer: Ketones

Solution:

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

In IR spectroscopy, which functional group typically shows a strong absorption around 1700 cm-1?

In IR spectroscopy, which functional group typically shows a strong absorption around 1700 cm-1?

Step 1: Understand what IR spectroscopy is. It is a technique used to identify functional groups in molecules by measuring how they absorb infrared light.
Step 2: Know that different functional groups absorb infrared light at specific wavelengths, which are measured in cm-1.
Step 3: Identify the functional group in question. The question asks about a strong absorption around 1700 cm-1.
Step 4: Recall that the carbonyl group (C=O) is a common functional group that absorbs strongly in this region.
Step 5: Recognize that ketones are a type of compound that contains a carbonyl group.
Step 6: Conclude that ketones typically show a strong absorption around 1700 cm-1 due to the stretching vibration of the carbonyl bond.

Infrared Spectroscopy – A technique used to identify functional groups in organic compounds based on their absorption of infrared light.
Carbonyl Group – A functional group characterized by a carbon atom double-bonded to an oxygen atom (C=O), which typically absorbs in the IR region around 1700 cm-1.