Chretien, Jacques R. published the artcileGas chromatography of homologous esters. XXX. Unexpected predominancy of polar effects over steric effects in crowded aliphatic esters: a gas-liquid chromatographic appraisal of specific interactions, Application of Ethyltert-butylacetate, the publication is Journal of Chromatography (1985), 324(2), 355-62, database is CAplus.
The chromatog. behavior of sixteen hindered α,α-disubstituted or α,α,α-trisubstituted aliphatic Et or Me esters containing C4-9 acyl groups is presented. Kovats index increments, on height stationary phases of increasing polarity and the contributions of the Me groups, obtained by progressive substitution are discussed. The polar and steric effects are separated by use of IR and an extended Taft scale (-E‘s) ranging over 8 powers of 10 for the considered acyl groups. Predominancy of polar effects over steric effects is demonstrated for the congested α,α,α-trisubstituted esters containing C7-9 acyl groups.
Journal of Chromatography published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C8H16O2, Application of Ethyltert-butylacetate.
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