F

Functional Group

-OH, C=O, -COOH, -NH₂, C=C, C≡C, -X
Quick Reference
Formula / Notation-OH, C=O, -COOH, -NH₂, C=C, C≡C, -X
Also Known AsOrganic functional group, reactive group, substituent, functional moiety

What is Functional Group?

A reactive group of atoms in an organic molecule that determines its chemical properties and reactions. The same functional group undergoes similar reactions regardless of the rest of the molecule. Recognizing functional groups is fundamental to systematic organic chemistry.

Formula & Notation

-OH, C=O, -COOH, -NH₂, C=C, C≡C, -X

Other Names / Synonyms: Organic functional group, reactive group, substituent, functional moiety

Properties & Characteristics

A functional group is a specific atom or group of atoms within a molecule responsible for its characteristic chemical reactions, physical properties, and nomenclature. Functional groups are the basis of the classification of organic chemistry (alcohols, aldehydes, ketones, acids, esters, amines, etc.). The same functional group behaves similarly across different molecular contexts, allowing reaction prediction by analogy.

Uses & Applications

Functional group transformations are at the heart of organic synthesis: converting one functional group to another by defined reactions (functional group interconversions, FGI). This strategy allows systematic construction of target molecules from simpler building blocks in retrosynthetic analysis.

Safety Information

Reactive functional groups (acid chlorides, isocyanates, epoxides, peroxides, diazonium salts) can react violently with air, water, or biological tissues. Proper training in handling reactive functional groups is essential before carrying out organic synthesis.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Functional Group
Formula -OH, C=O, -COOH, -NH₂, C=C, C≡C, -X
Synonyms Organic functional group, reactive group, substituent, functional moiety

Frequently Asked Questions

A reactive group of atoms in an organic molecule that determines its chemical properties and reactions. The same functional group undergoes similar reactions regardless of the rest of the molecule. Recognizing functional groups is fundamental to systematic organic chemistry.

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