Double Carbon Bond
Alkene
Triple Carbon Bond
Alkyne
R-O-H
Alcohol
R-O-R
Ether
R - C - H
=O
Aldehyde
R - O - R
=O
Ketone
R - C - O - H
=O
Carboxylic Acid
R - C - O - R
=O
Ester
R - N - R
-H
Amine
R - C - N - R
=O -H
Amide