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