C≡C
alkyne
C-C
alkane
C=C
alkene
C-X
Halides
C-OH
alcohols
C-O-C
Ethers
C-SH
Thiol
C-S-R
Sulfide
C-N
Amine
C=O
Carbonyl
(not standalone FG)
C-S-R
Sulfide
C-N
Amine
C=O
Carbonyl
Aldehyde
Ketone
Ester
Amide
Carboxylic Acid
Carbon number prefix
1
meth-
Carbon number prefix
2
eth-