Alkane
C-C
Alkene
C=C
Alkyne
carbon-carbon triple bond
Haloalkane Acid
C-X
Carboxylic acid
O=C-O-H
Alcohol
C-O-H
Aldehyde
O=C-H
Ketone
C-C=O-C
Amide
O=C-N
Amine
C-N
Ether
C-O-C
Ester
O=C-O-C