Functional group
Alkane
Example
CH3
H 3C
pKa
~50
Conjugate Base
CH2
H 3C
H
Alkene
~43
Hydrogen
Amine
Sulfoxide
Alkyne
H 3C
H H
36
NH 3
~35
O
S
CH3
H
25
R
C
25
25
H 3CO
N
OH
H 3C
Water
HO–H
C
N
O
CH3
Alcohol
CH2
H 2C
O
H 3C
CH2
O
CH3
H 3C
O
S
H 3C
O
H 3CO
Ketone/
aldehyde
NH 2
31
R
Ester
Nitrile
H
20-24
H 3C
17
H 3C
16
HO
CH2
O