Abstract
(Topological analysis of the gas-liquid chromatographic behaviour of saturated and unsaturated aliphatic esters.) Topological analysis is applied to tje Kovats retention indices for a collection of aliphatic esters on six stationary phases. Three subclasses are treated separately: (1) 100 saturated esters; (2) 45 esters unsaturated in the acidic part and 53 saturated but topologically similar esters; (3) 24 esters unsaturated in the alcohol moiety and 6 saturated but topologically similar esters. A detailed study is reported for the correlation of structural effects with numerical data for the specific solute/stationary phase interactions at the level of carbon atoms and ethylenic double bonds. The roles of the carboxylic ester nucleus, the branching and lengthening of the chain and the presence of ethylenic double bonds is elucidated. The selectivity of trifluoropropyl- and phenyl-bonded stationary phases is clarified.
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