Nuclear magnetic resonance studies of cyclodextrin complexes of linoleic acid and arachidonic acid.

Jyothirmayi, N. and Ramadoss, C. S. and Divakar, S. (1991) Nuclear magnetic resonance studies of cyclodextrin complexes of linoleic acid and arachidonic acid. Journal of Agricultural and Food Chemistry, 39 (12). pp. 2123-2127.

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Abstract

Structures of a- and /3-cyclodextrin complexes of linoleic and arachidonic acids were investigated by detailed 1H spin-lattice relaxation time (7'1) measurements and one-dimensional difference nuclear Overhauser enhancement (NOE) studies. On the basis of the observed NOE proximities and 2'1 values, it is concluded that the carboxyl arms of both linoleic and arachidonic acids are present within the cyclodextrin cavity with double bonds partly exposed or buried. While the double bond at 9-10 in linoleic acid is buried, the one at 12-13 is exposed, the molecule from position 11 being present in an inclined position, with the methyl end pointing away from the cavity laterally. The double bond in arachidonic acid at position 5-6 is buried; the other at 8-9 lies exposed. While the carboxyl arm is present within the cavity, the methyl arm lies parallel to the carboxyl arm outside the cavity.

Item Type:	Article
Uncontrolled Keywords:	Cyclodextrins, linoleic acid, arachidonic acid, nuclear magnetic resonance
Subjects:	500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 31 Sugar Chemistry
Divisions:	Dept. of Biochemistry
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	06 Mar 2018 11:14
Last Modified:	06 Mar 2018 11:14
URI:	http://ir.cftri.res.in/id/eprint/4724

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