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preface to fifteenth edition

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7.20 SECTION 7<br />

TABLE 7.9<br />

Electronic Absorption Bands for Representative Chromophores (Continued)<br />

Chromophore System max max<br />

Pentacene 310<br />

585<br />

Pyridine 174<br />

195<br />

257<br />

Quinoline 227<br />

270<br />

314<br />

Isoquinoline 218<br />

266<br />

317<br />

300 000<br />

12000<br />

80 000<br />

6 000<br />

1 700<br />

37 000<br />

3 600<br />

2750<br />

80 000<br />

4 000<br />

3 500<br />

TABLE 7.10 Ultraviolet Cu<strong>to</strong>ffs of Spectrograde Solvents<br />

Absorbance of 1.00 in a 10.0 mm cell vs. distilled water.<br />

Solvent<br />

Wavelength,<br />

nm<br />

Solvent<br />

Wavelength,<br />

nm<br />

Acetic acid 260<br />

Ace<strong>to</strong>ne 330<br />

Ace<strong>to</strong>nitrile 190<br />

Benzene 280<br />

1-Butanol 210<br />

2-Butanol 260<br />

Butyl acetate 254<br />

Carbon disulfide 380<br />

Carbon tetrachloride 265<br />

1-Chlorobutane 220<br />

Chloroform (stabilized<br />

245<br />

with ethanol)<br />

Cyclohexane 210<br />

1,2-Dichloroethane 226<br />

Diethyl ether 218<br />

1,2-Dimethoxyethane 240<br />

N,N-Dimethylacetamide 268<br />

N,N-Dimethylformamide 270<br />

Dimethylsulfoxide 265<br />

1,4-Dioxane 215<br />

Ethanol 210<br />

2-Ethoxyethanol 210<br />

Ethyl acetate 255<br />

Ethylene chloride 228<br />

Glycerol 207<br />

Heptane 197<br />

Hexadecane 200<br />

Hexane 210<br />

Isobutyl alcohol 230<br />

Methanol 210<br />

2-Methoxyethanol 210<br />

Methylcyclohexane 210<br />

Methylene chloride 235<br />

Methyl ethyl ke<strong>to</strong>ne 330<br />

Methyl isobutyl ke<strong>to</strong>ne 335<br />

2-Methyl-1-propanol 230<br />

N-Methylpyrrolidone 285<br />

Nitromethane 380<br />

Pentane 210<br />

Pentyl acetate 212<br />

1-Propanol 210<br />

2-Propanol 210<br />

Pyridine 330<br />

Tetrachloroethylene<br />

290<br />

(stabilized with thymol)<br />

Tetrahydrofuran 220<br />

Toluene 286<br />

1,1,2-Trichloro-1,2,2-<br />

231<br />

trifluoroethane<br />

2,2,4-Trimethylpentane 215<br />

o-Xylene 290<br />

Water 191

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