ABSTRACT
Carbon Tetrachloride Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
260 1.000 263 1.000 275 0.300 275 0.100 300 0.010 300 0.005 350 0.005 350 0.005 400 0.005 400 0.005
n
-Butyl Acetate
Chlorobenzene Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
254 1.000 287 1.000 275 0.050 300 0.050 300 0.010 325 0.040 350 0.005 350 0.020 400 0.005 400 0.005
n
-Butyl Chloride
Chloroform Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
220 1.000 245 1.000 225 0.300 250 0.300 250 0.010 275 0.005 300 0.005 300 0.005 400 0.005 400 0.005
Cyclohexane
o
-Dichlorobenzene Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
200 1.000 295 1.000 225 0.170 300 0.300 250 0.020 325 0.100 300 0.005 350 0.050 400 0.005 400 0.005
Cyclopentane
Diethyl Carbonate Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
200 1.000 256 1.000 215 0.300 265 0.150 225 0.020 275 0.050 300 0.005 300 0.040 400 0.005 400 0.010
Decahydronaphthalene
Dimethyl Acetamide Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
200 1.000 268 1.000 225 0.500 275 0.300 250 0.050 300 0.080 300 0.005 350 0.005 400 0.005 400 0.005
Dimethyl Formamide
2-Ethoxyethanol Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
268 1.000 210 1.000 275 0.300 225 0.500 300 0.050 250 0.200 350 0.005 300 0.005 400 0.005 400 0.005
Dimethyl Sulfoxide
Ethyl Acetate Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
268 1.000 256 1.000 275 0.500 275 0.050 300 0.200 300 0.030 350 0.020 325 0.005 400 0.005 350 0.005
1,4-Dioxane
Diethyl Ether Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
215 1.000 215 1.000 250 0.300 250 0.080 300 0.020 275 0.010 350 0.005 300 0.005 400 0.005 400 0.005
Ethylene Dichloride
Hexadecane Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
228 1.000 190 1.000 240 0.300 200 0.500 250 0.100 250 0.020 300 0.005 300 0.005 400 0.005 400 0.005
Ethylene Glycol Dimethyl Ether
(Glyme)
Hexane Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
220 1.000 195 1.000 250 0.250 225 0.050 300 0.050 250 0.010 350 0.010 275 0.005 400 0.005 300 0.005
Heptane
Isobutanol Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
200 1.000 220 1.000 225 0.100 250 0.050 250 0.010 275 0.030 300 0.005 300 0.020 400 0.005 400 0.010
Methanol
Methyl-
t
-Butyl Ether Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
205 1.000 210 1.000 225 0.160 225 0.500 250 0.020 250 0.100 300 0.005 300 0.005 400 0.005 400 0.005
2-Methoxyethanol
Methylene Chloride Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
210 1.000 233 1.000 250 0.130 240 0.100 275 0.030 250 0.010 300 0.005 300 0.005 400 0.005 400 0.005
2-Methoxyethyl Acetate
Methyl Ethyl Ketone Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
254 1.000 329 1.000 275 0.150 340 0.100 300 0.050 350 0.020 350 0.005 375 0.010 400 0.005 400 0.005
Methyl Isoamyl Ketone
n
-Methylpyrrolidone Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
330 1.000 285 1.000 340 0.100 300 0.500 350 0.050 325 0.100 375 0.010 350 0.030 400 0.005 400 0.010
Methyl Isobutyl Ketone
Pentane Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
334 1.000 190 1.000 340 0.500 200 0.600 350 0.250 250 0.010 375 0.050 300 0.005 400 0.005 400 0.005
Methyl
n
-Propyl Ketone
β
-Phenethylamine Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
331 1.000 285 1.000 340 0.150 300 0.300 350 0.020 325 0.100 375 0.005 350 0.050 400 0.005 400 0.005
1-Propanol
Pyridine Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
210 1.000 330 1.000 225 0.500 340 0.100 250 0.050 350 0.010 300 0.005 375 0.010 400 0.005 400 0.005
2-Propanol
Tetrahydrofuran Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
205 1.000 212 1.000 225 0.160 250 0.180 250 0.020 300 0.020 300 0.005 350 0.005 400 0.010 400 0.005
Propylene Carbonate
Toluene Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
280 1.000 284 1.000 300 0.500 300 0.120 350 0.050 325 0.020 375 0.030 350 0.050 400 0.020 400 0.005
1,2,4-Trichlorobenzene
2,2,4-Trimethylpentane Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
308 1.000 215 1.000 310 0.500 225 0.100 350 0.050 250 0.020 375 0.010 300 0.005 400 0.005 400 0.005
Trichloroethylene
Water Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
273 1.000 190 0.010 300 0.100 200 0.010 325 0.080 250 0.005 350 0.060 300 0.005 400 0.060 400 0.005
1,1,2-Trichlorotrifluoroethane
o
-Xylene Wavelength,
nm Maximum
Absorbance Wavelength,
nm Maximum
Absorbance
231 1.000 288 1.000 250 0.050 300 0.200 300 0.005 325 0.050 350 0.005 350 0.010 400 0.005 400 0.005
Transmittance-Absorbance Conversion
Transmittance Absorbance Percent
Uncertainty
0.980 0.009 25.242 0.970 0.013 16.915 0.960 0.018 12.752 0.950 0.022 10.256 0.940 0.027 8.592 0.930 0.032 7.405 0.920 0.036 6.515 0.910 0.041 5.823 0.900 0.046 5.270 0.890 0.051 4.818 0.880 0.056 4.442 0.870 0.060 4.125 0.860 0.065 3.853 0.850 0.071 3.618 0.840 0.076 3.412 0.830 0.081 3.231 0.820 0.086 3.071 0.810 0.091 2.928 0.800 0.097 2.799 0.790 0.102 2.684 0.780 0.108 2.579 0.770 0.113 2.483 0.760 0.119 2.386 0.750 0.125 2.316 0.740 0.131 2.243 0.730 0.137 2.175 0.720 0.143 2.113 0.710 0.149 2.055 0.700 0.155 2.002 0.690 0.161 1.952 0.680 0.167 1.906 0.670 0.174 1.863 0.660 0.180 1.822 0.650 0.187 1.785 0.640 0.194 1.750 0.630 0.201 1.717 0.620 0.208 1.686 0.610 0.215 1.657 0.600 0.222 1.631 0.590 0.229 1.605 0.580 0.237 1.582
Transmittance Absorbance Percent
Uncertainty
0.570 0.244 1.560 0.560 0.252 1.539 0.540 0.268 1.502 0.530 0.276 1.485 0.520 0.284 1.470 0.510 0.292 1.455 0.500 0.301 1.442 0.490 0.310 1.430 0.480 0.319 1.419 0.470 0.328 1.408 0.460 0.337 1.399 0.450 0.347 1.391 0.440 0.356 1.383 0.430 0.366 1.377 0.420 0.377 1.372 0.410 0.387 1.367 0.400 0.398 1.364 0.390 0.409 1.361 0.380 0.420 1.359 0.370 0.432 1.358 0.360 0.444 1.359 0.350 0.456 1.360 0.340 0.468 1.362 0.330 0.481 1.366 0.320 0.495 1.371 0.310 0.509 1.376 0.300 0.523 1.384 0.290 0.538 1.392 0.280 0.553 1.402 0.270 0.569 1.414 0.260 0.585 1.427 0.250 0.602 1.442 0.240 0.620 1.459 0.230 0.638 1.478 0.220 0.657 1.500 0.210 0.678 1.525 0.200 0.699 1.553 0.190 0.721 1.584 0.180 0.745 1.619 0.170 0.769 1.659 0.160 0.796 1.704 0.150 0.824 1.756 0.140 0.854 1.816 0.130 0.886 1.884 0.120 0.921 1.964 0.110 0.958 2.058 0.100 1.000 2.170 0.090 1.046 2.306 0.080 1.097 2.473 0.070 1.155 2.685 0.060 1.222 2.961 0.050 1.301 3.336 0.040 1.398 3.881 0.030 1.523 4.751 0.020 1.699 6.387 0.010 2.000 10.852
Co rr
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Ch ro
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nc tio
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γ
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m
ε
γ
, n
m
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γ
, n
m
ε
Et he
r – O
– 18
5 10
00 Th
io et
he r
– S-
19 4
46 00
21 5
16 00
Am in
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H
– 19
5 28
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– CO
NH
< 21
0 —
Th io
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19 5
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D is
ul fid
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SS-
19 4
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Br om
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– Br
20 8
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de – I
26 0
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N itr
ile – C
≡
N 16
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Ac et
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(al
ky ne
) – C
≡
C17
0 60
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– SO
– 18
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19 0
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28 0-
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→
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10 Az
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28 5-
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2 10
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NO
27 0
(sh ou
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12 Co
nju ga
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dr oc
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=C )
–
(ac yc
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23 0
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– (C
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26 0
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Co nju
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– (C
=C ) 2-
(al icy
cli c)
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–8 00
Co nju
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hy dr
oc ar
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C= C-
C≡ C
21 9
65 00
Co nju
ga ted
sy ste
m C=
CC=
N 22
0 23
,0 00
Co rr
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Ta bl
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(co nt
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) Ch
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γ m
n m
, n
m ε m
n m
Co nju
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sy ste
m C=
CC=
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0 10
,0 00
–2 0,
00 0
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Co nju
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sy ste
m C=
CNO
2 22
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N ap
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An th
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25 2
19 9,
00 0
37 5
79 00
Py rid
in e
17 4
80 ,0
00 19
5 60
00 25
1 17
Qu ino
lin e
22 7
37 ,0
00 27
0 36
00 31
4 27
Is oq
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lin e
21 8
80 ,0
00 26
6 40
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7 35
N
Rules of Diene Absorption Base value for diene: 214 nm Increments for (each) (in nm):
Heteroannular diene +0 Homoannular diene +39 Extra double bond +30 Alkyl substituent or ring residue +5 Exocyclic double bond +5 Polar groups:
–OOCR +0 –OR +6 –S-R +30 Halogen +5 –NR2 +60
λ Calculated = Total
Base value for acyclic (or six-membered) α,β-unsaturated ketone: 215 nm Base value for five-membered α,β-unsaturated ketone: 202 nm Base value for α,β-unsaturated aldehydes: 210 nm Base value for α,β-unsaturated esters or carboxylic acids: 195 nm Increments for (each) (in nm):
Heteroannular diene +0 Homoannular diene +39 Double bond +30 Alkyl groups
α-+10 β-+12 γ-and higher +18
Polar groups: –OH
α-+35 β-+30 δ-+50
–OOCR α, β, γ, δ +6
–OR α-+35 β-+30 γ-+17 δ-+31
–SR β-+85
–Cl α-+15 β-+12
–Br α-+25 β-+30
–NR2 β-+95
Exocyclic double bond + 5
λ Calculated = Total
a Solvent corrections should be included. These are water (–8), chloroform (+1), dioxane (+5), ether (+7), hexane (+11), cyclohexane (+11). No correction for methanol or ethanol.
