Organic Chemistry functional groups

organic acid

a COOH group replaces a hydrogen atom

Alcohol

-OH (hydroxy group)

Aldehyde

C=O (carbonyl group)

Halide

-X (halo group)
Halogen bonded to carbon

Amide

-CONH2, -CONHR, -CONR2

Amine

-NH2 (amino group)

Carboxylic acid

-COOH (carboxyl group)

Ester

-COOR

Ether

-OR (alkoxy group)

Ketone

-C=O (carbonyl group)