446
9 UV/Vis
Chromophore Compound
Transition λ max [nm] ε max Solvent
C–I
CH 3 I
n  σ*
259
400 hexane
C–O
CH 3 OH
n  σ*
177
200 hexane
CH 3 OCH 3
n  σ*
184
2500 gas
C–N
(C 2 H 5 ) 2 NH
n  σ*
193
2500 hexane
(CH 3 ) 3 N
n  σ*
199
4000 hexane
C=N
H 2 N
NH 2
NH
HCl
.
265
15 water
(CH 3 ) 2 C=NOH
193
2000 ethanol
(CH 3 ) 2 C=NONa
265
200 ethanol
N=N
CH 3 –N=N–CH 3
340
16 ethanol
N=O
(CH 3 ) 3 C–NO
300
665
100
20
ether
(CH 3 ) 3 C–NO 2
276
27 ethanol
n-C 4 H 9 –O–NO
218
313–384
1050
20–40
ethanol
ethanol
C 2 H 5 –O–NO 2
260
15 ethanol
C– – – N
CH 3 C– – – N
<190
X=Y=Z
C 2 H 5 –N=C=S
250
1200 hexane
C 2 H 5 –N=C=N–C 2 H 5
230
270
4000
25
C–S
CH 3 SH
n  σ*
n  σ*
195
235
1800
180
gas
C 2 H 5 –S–C 2 H 5
n  σ*
n  σ*
194
225
4500
1800
gas
C 2 H 5 –S–S–C 2 H 5
n  σ*
n  σ*
194
250
5500
380
hexane
C=S
(CH 3 ) 2 C=S
460
weak
S
495
weak ethanol
C=O
(CH 3 ) 2 C=O
n  σ*
π   π*
n  π*
166
189
279
16000
900
15
gas
hexane
hexane
CH 3 COOH
n  π*
200
50 gas
CH 3 COONa
n  π*
210
150 water
CH 3 COOC 2 H 5
n  π*
210
50 gas
CH 3 CONH 2
n  π*
220
63 water
H
N
O
O
191
15200 CH 3 CN
C=C=O
(C 2 H 5 ) 2 C=C=O
227
375
360
20