Chem functional groups

R-O-R

ETHER

R-ClR-IR-BrR-F

HALIDE

R-C=-N

NITRILE

...O....O...||....||R-C-O-C-R

ACID ANHYDRIDE

.......R.O.......|.||H-N-C-C-O-H...|...|...H..H

AMINO ACID

R..R|...|C=C|...|R..R

ALKENE

R-OH

ALCOHOL

...O...||R-C-H

ALDEHYDE

...O...||R-C-R

KETONE

...O...||R-C-O-H

CARBOXYLIC ACID

...O...||R-C-O-R

ESTER

R-N-R../R

AMINE

...O...||R-C-N-R.......\........R

AMIDE