Individual Molecular Species of Phospholipids. VI. Chromatographic Behavior of 1-Oleo-2-stearo-3-acetin and 1-Stearo-2-oleo-3-acetin.

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Abstract
This report shows that synthetic 1-stearo-2-oleo-3-acetin (SOAc) and l-oleo-2-stearo-3-acetin (OSAc) are very similar. They can be separated by thin-layer chromatography only with difficulties even when the multiple development technique is used. The fact that 1-oleo-2-stearin tryglyceride (OST) was more retarded than 1-stearo-2-olein tryglyceride (SOT) on argentation chromato-grams shows that the olefinic double bond in SOT is slightly hindered in comparison to OST. In SOAc and OSAc, the double bonds seem to be more equally exposed to the environment. These findings suggest that under the conditions described the triglyceride molecules prefer conformations where the long chains stick together.

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