N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
354
7 IR
H
O
OH
H
neat: 1700
in CCl 4 :
1694
H O
OH
O
neat: 1725
Cl
O H
O
neat: 1730
O
–
O
NH 3
+
solid: 1605
O H
O
N H 3
+
solid:
1740
O H
O
O
in CCl 4 :
1788
1725
HO
O H
O
O
solid: 1650 H O
OH
O
O
solid:
1735
1703
H O
O H
O
O
solid:
1724
O
OH
solid: 1690
in CCl 4 :
1730
in CHCl 3 :
1706
O
O H
O
O H
solid:
1690
O
OH
O
OH
solid:
1690
O
O H
O H
solid: 1667
in CCl 4 :
1696
in CHCl 3 :
1661
O
O H
O
in CCl 4 :
1750
O
O H
O
solid:
1693
in CCl 4 :
1696
7.11.4 Esters and Lactones
CO–O st as
%T
400
800
1200
1600
2000
2800
3600
C=O st
O–C–C st as