The Β-2 crystal structures of a series of saturated and trans-mono-unsaturated triacylglycerols (TAGs) have been solved from high-resolution powder synchrotron diffraction data. The series comprises symmetric as well as asymmetric even-numbered TAGs and the trans-mono- unsaturated ones all have a single elaidoyl chain. The structures have been solved with the direct-space parallel-tempering program FOX and refined with the Rietveld program GSAS. The Β-2 structures all crystallized in the space group with the same molecular conformation. Within the resolution of the data no significant difference in packing or conformation is observed between trans-mono-unsaturated TAGs and saturated (stearoyl or palmitoyl) chain-containing analogues, in spite of the lower melting points of the former. An analysis of the position of the stepped methyl end-plane in the various subgroups of TAGs confirms most but not all suppositions found in the literature. © 2008 International Union of Crystallography.
CITATION STYLE
Van Mechelen, J. B., Peschar, R., & Schenk, H. (2008). Structures of mono-unsaturated triacylglycerols. III. the Β-2 polymorphs of trans-mono-unsaturated triacylglycerols and related fully saturated triacylglycerols. Acta Crystallographica Section B: Structural Science, 64(2), 240–248. https://doi.org/10.1107/S0108768108004813
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