Carboxyl

usgb/kɑrˈbɑksɪl/
Noun

A carboxyl group is a functional group comprising a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group.

The carboxyl group is present in all amino acids.
Visual representation of "carboxyl" - A carboxyl group is a functional group comprising a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group.

Often appears as...

  • carboxyl group
  • carboxylic acid

Usage tips

Neutral

Technical

Definition 1 of 2
Visual representation of "carboxyl"
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Chemical Structure

Understanding the structure of a carboxyl group is crucial for organic chemistry.

Illustration for Chemical Structure
The carboxyl group (−COOH) forms acids.
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Role in Biochemistry

Carboxyl groups play vital roles in biological molecules.

Illustration for Role in Biochemistry
They can participate in chemical reactions important in metabolism.
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Common Confusions

Do not confuse carboxyl with carbonyl, which lacks the hydroxyl group.

Illustration for Common Confusions
Carboxyl includes −COOH while carbonyl is just C=O.
Visual representation of the word "Carboxyl"

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