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The non‐uniformity of B‐linoleic acid
Author(s) -
Kummerow Fred A.,
Green Eileen L.
Publication year - 1947
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02593246
Subject(s) - bromine , chemistry , linoleic acid , hydrogen bromide , acetone , alcohol , bromide , organic chemistry , homogeneous , chromatography , fatty acid , physics , thermodynamics
Summary Methyl esters of α‐ and β‐linoleic acid were chromatographed on activated alumina and separated into fractions eluted with Skellysolve F and acetone, respectively. Methyl α‐linoleate was found to be chromatographically homogeneous in character while methyl β‐linoleate was not. The latter contained a small amount of yellow viscous material which appeared to be monobromooleic acid; this bromine could not be removed by treatment with zinc in absolute alcohol. A similar substance could be isolated from methyl α‐linoleate through which bromine‐free, hydrogen bromide had been bubbled for two hours at 0° C. The presence of this bromine containing substance was shown to be partly responsible for the differences in the characteristics of α‐ and β‐linoleic acid.