Definition

A type of chemical compound that has a specific structure with a hydroxyl group and an alkyl group, often formed during the process of making acetals from aldehydes or ketones.

Example

In organic chemistry, a hemiacetal can be formed when an aldehyde reacts with an alcohol.

Conversation

Have you ever heard of a hemiacetal?

No, I haven't. What is it?

It's a type of compound that's formed from aldehydes or ketones.

That sounds interesting! How is it used in chemistry?

Synonyms & Antonyms

Root Explanation

Hemiacetal → It is formed from "hemi-" (from Greek "hēmi-", meaning half) and "acetalis" (from Latin "acetum", meaning vinegar). The term refers to a compound that is half an acetal, which is derived from the reaction of an alcohol with an aldehyde or ketone.

Memory Tip

Think of 'half' ('hemi-') of an 'acetal' — that's why hemiacetal refers to a compound that is half an acetal.

Visually Confused Words