Abstract
52 Aromatic hydrocarbons boiling up to 218° were identified in a low-temperature bituminous coal tar by means of gas-liquid chromatography and infrared spectrophotometry, 27 of these for the first time. Quantitative determinations were made on 43 compounds boiling up to 200°. It was shown that alkylbenzenes with equal numbers of carbon atoms in their alkyl groups exhibit a linear relationship between log relative retention and normal boiling point, and that the C 8, C 9, C 10, C 11, and C 12 alkylbenzenes lie on five parallel lines whose separation from each other is related to the logarithm of the number of carbon atoms in the alkyl group. Examples of the accuracy and utility of these novel correlations are presented.
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