N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
346
7 IR
Xanthates
Thiocarbonates
Thioureas
Typical Ranges (v ~ in cm -1 )
Assignment
Range
Comments
S–H st
2560–2510
Weak, narrow
trithiocarbonates
2600–2500
Weak, narrow
xanthates
C=S st
1100–1020
Very strong
trithiocarbonates
1070–1000
Strong
xanthates
1250–1180
Strong
thiocarbonates
1400–1100
Strong
thioureas
COC st as
1260–1140
Strong
xanthates
COC st sy
1150–1090
Strong to medium
xanthates
%T
400
800
1200
1600
2000
2800
3600
COC st as
S–H st
C=S st
COC st sy
%T
400
800
1200
1600
2000
2800
3600
C=S st
%T
400
800
1200
1600
2000
2800
3600
C=S st