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X‐Ray diffraction study of sodium soaps of monounsaturated and polyunsaturated fatty acids
Author(s) -
Jandacek R. J.,
Broering W. B.
Publication year - 1989
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02544070
Subject(s) - polyunsaturated fatty acid , chemistry , docosahexaenoic acid , sodium , eicosapentaenoic acid , organic chemistry , fatty acid
X‐Ray powder diffraction patterns of the sodium soaps of 14 monounsaturated and polyunsaturated fatty acids were obtained at room temperature. The patterns of the soaps of 9,12‐ trans,trans ‐octadecadienoic acid, 11,14‐ cis,cis ‐eicosadienoic acid 11,14,17‐all cis ‐eicosatrienoic acid and 5 monounsaturated fatty acids were typical of the crystalline lamellar phase. The patterns of the soaps of 9,12‐ cis,cis ‐octadecadienoic, all cis ‐9,12,15‐octadecatrienoic, all cis ‐8,11,14‐eicostrienoic, all cis ‐5,8,11,14‐eicosatetraenoic, all cis ‐5,8,11,14,17‐eicosapentaenoic and all cis ‐4,7,10,13,16,19‐docosahexaenoic acids were indicative of the less ordered forms reported for sodium oleate at elevated temperature. The diffraction data from the less ordered soaps are consistent with the melted form of the hydrocarbon chains of the unsaturated acids at room temperature.