Pharmaceutical organic chemistry -1,Contains basicity of amines & properties of aliphatic amines to pharmacy students & life science chemistry students
3. Lower members
aliphatic amines ammonia smell
Higher members
fishy smell
physical sate
Boiling points
polar compounds Form molecular hydrogen bonding
Amines higherbioling points
N
H
R
H
H N H N H
R
H
R
H
Solubility
amines soluble in water
less in polar solvents
eg.organic solvents
H N
H
R
O
H
HH N
R
H
4. Chemical properties
Basicity of amine
R NH2 + HCl R NH Cl
3
+ -
1
0
amine
Salt
R NH2 + H2O R NH2OH R NH3 + OH
+
_
+ _
R NH2 + H2O R NH3 + OH
+ _
Kb =
(R NH3) (OH)
+
(RNH2)
pK
b
= -logKb
smaller value of pKb Stronger basicity of amine