Elsevier

Journal of Chromatography A

Volume 217, 6 November 1981, Pages 125-137
Journal of Chromatography A

Gas—liquid chromatographic retention behaviour of hindered aliphatic esters

https://doi.org/10.1016/S0021-9673(00)88067-XGet rights and content

Abstract

Relative retentions and Kováts retention indices of sixteen crowded aliphatic ethyl or methyl esters (R1R2CHCO2R or R1R2R3CCO2R; R = ethyl or methyl) have been systematically determined on nine stationary phases of increasing polar character from the non-polar branched-chain hydrocarbon C87H176 to the highly polar cyanopropylsiloxane Silar–10C. A qualitative pattern showing the retention behaviour of the branched acyl group of the esters is developed. An unexpectedly strong contribution of polar effect occurs with highly congested acyl groups in α,α,α-trialkyl esters.

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    Part XIV of the series “Gas Chromatography of esters”. For Part XIII, see ref. 1.

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