Hydroxyl

usgb/haɪˈdrɑːksɪl/
Noun

A hydroxyl group is a chemical group consisting of one oxygen atom connected to one hydrogen atom (–OH).

The hydroxyl group is integral to the structure of alcohol.
Visual representation of "hydroxyl" - A hydroxyl group is a chemical group consisting of one oxygen atom connected to one hydrogen atom (–OH).

Often appears as...

  • hydroxyl ions
  • hydroxyl radicals

Usage tips

Neutral

functional group, organic chemistry, alcohol

Definition 1 of 2
Visual representation of "hydroxyl"
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Functional Group

A hydroxyl group is essential for understanding organic chemistry.

Illustration for Functional Group
The presence of a hydroxyl group in a molecule defines its properties.
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Common Compounds

Many substances contain hydroxyl groups.

Illustration for Common Compounds
Water is the simplest compound with a hydroxyl group.
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Chemical Behavior

Hydroxyl groups influence how substances react chemically.

Illustration for Chemical Behavior
They can make organic compounds soluble in water.
Visual representation of the word "Hydroxyl"

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