N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
344
7 IR
Assignment
Range
Comments
st as
st sy
1420–1300
1200–1000
Very strong; in Raman, often missing
Very strong; in Raman, strong
Subranges:
1370–1290,
1170–1110
R–SO 2 –R
1375–1350,
1185–1165
R–SO 2 –OR
≈1340, ≈1150
R–SO 2 –SR
1415–1390,
1200–1185
RO–SO 2 –OR
1365–1315,
1180–1150
R–SO 2 –N
N–H st: 3330–3250;
N–H δ: ≈1570;
S–N st: 910–900
1410–1375,
1205–1170
R–SO 2 –hal
1355–1340,
1165–1150
R–SO 2 –OH
O–H st, H-bonded: ≈2900,
≈2400
hydrated: 2800–1650, broad
1250–1140,
1070–1030
R–SO 3
–
1315–1220,
1140–1050
RO–SO 3
–
S–O st
870–690
Of variable intensity, weak in sulfites
S
O
O