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Functional Group Class Terms

Chemical Abstracts Service, 1993. Reproduced for educational purposes with permission from CAS, a Division of the American Chemical Society.

There are ten functional group class terms. Each class term encompasses a number of specific terms that represent functional groups.

Class Terms

• Alcohols
• Alkenes
• Alkynes
• Amines
• Carbonate derivatives
• Carboxy derivatives
• Halides
• Heterocycles
• Ketones
• Organometallics

Class Terms and Functional Groups included

Alcohols

• Allyl Alcohol
• Cyanohydrin
• Cyclic Alcohol
• Enol
• Glycol
• Halohydrin
• Hemiacetal
• Hydroxylamine
• Phenol
• Primary Alcohol
• Secondary Alcohol
• Tertiary Alcohol

Alkenes

• Acyclic Alkene
• Cyclic Alkene

Alkynes

• Alkyne
• Enyne
• Pi-Alkyne

Amines

• Amine Oxide
• Aziridine
• Chloramine
• Cyanamide
• Enamine
• Hydroxylamine
• Imine
• Primary Amine
• Secondary Amine
• Tertiary Amine

Carbonate Derivatives

• Carbamate
• Carbonate
• Guanidine
• Haloformate
• Thiourea
• Urea

Carboxy Derivatives

• Acid Halide
• Amide
• Amidine
• Anhydride
• Carboxylate
• Carboxylic
• Haloformate
• Imide
• Lactam
• Lactone
• Peroxy Acid
• Peroxy Ester
• Thioamide
• Thiocarboxy

Halides

• Acid Halide
• Alkyl Halide
• Allyl Halide
• Aryl Halide
• Chloramine
• Gem-Dihalide
• Haloformate
• Halohydrin
• Metal Halide
• Sulfenyl Halide
• Sulfinyl Halide
• Sulfonyl Halide
• Trihalide
• Vic-Dihalide
• Vinyl Halide

Heterocycles

• 1,2-C3N2
• 1,2-C3NO
• 1,2-C3NS
• 1,2-C3O2
• 1,2-C30S
• 1,2-C3S2
• 1,2-C4N2
• 1,2-C4NO
• 1,2-C4NS
• 1,2-C4O2
• 1,2-C4OS
• 1,2-C4S2

• 1,3-C3N2
• 1,3-C3NO
• 1,3-C3NS
• 1,3-C3O2
• 1,3-C30S
• 1,3-C3S2
• 1,3-C4N2
• 1,3-C4NO
• 1,3-C4NS
• 1,3-C4O2
• 1,3-C4OS
• 1,3-C4S2

• 1,4-C4N2
• 1,4-C4NO
• 1,4-C4NS
• 1,4-C4O2
• 1,4-C4OS
• 1,4-C4S2
• 1,4-C5N2

• C2S
• C3N
• C3O
• C3S
• C4N
• C4O
• C4S
• C5N
• C5O
• C5S
• C6N
• C6O
• C6S

• Aziridine
• Cephem
• Episulfide
• Epoxide
• Penam
• Purine

Ketones

• Acyclic Ketone
• Cyclic Ketone
• O-Quinone
• P-Quinone

Organometallics

• Acylmetal
• Metal Arene
• Metal Carbene
• Metal Carbonyl
• Metal Cyclopendadienyl
• Metal Halide
• Metal Hydride
• Metal Metal Bond
• Metal Nitrogen
• Metal Nitrosyl
• Metal Phosphine
• Metal Sulfur
• Metallocarbocycle
• Mu-Carbonyl
• Organometal
• Pi-Alkene
• Pi-Alkyne
• Pi-Allyl