N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
340
7 IR
Examples (v ~ in cm -1 )
CH 3 –OCN
2248
OCN
2248
2282
O CN
2235
2261
2282
CH 3 –NCO
2265
NCO
2280
NCO
2270
N CO
2256
(1629 C=C)
N CO
2267
O
NCO
2246
7.9.8 Thiocyanates and Isothiocyanates
Thiocyanates
Isothiocyanates
C N st
%T
400
800
1200
1600
2000
2800
3600
C–S st
–N=C=S st as
%T
400
800
1200
1600
2000
2800
3600
–N=C=S st sy
C–N st