The Crystal Structure of a Diacid Triglyceride

Abstract

The x-ray structure analysis of a single crystal of the fi-form of 2-11-bromoundecanoyl-1, l'dicaprin has revealed an arrangement of carbon atom chains within a molecular layer that is identical to that found in the fi-form monoacid triglycerides. However the packing of the molecular layers within the crystal lattice is substantially different because of the unequal fatty acid chain-lengths in the symmetrical diacid triglyceride of this investigation.Insufficient diffraction data owing to difficulty in preparing crystals of adequate size prohibits computation of precise interatomic distances and angles for this triglyceride.

Structure of mono-acid even-numbered β-triacylglycerols

“…In this way, cell parameters and crystal structure models can also be predicted for -SSS, -AAA, -BBB Jensen & Mabis (1966); (b) Gibon et al (1984); (c) this work; (d) Doyne & Gordon (1968). and -TTT (Table 10).…”

“…The structure was solved using the program package CRUNCH (de Gelder et al, 1993) and H atoms were calculated. The coordinates of CL Br C were taken from Doyne & Gordon (1968). The H atoms were restrained at 0.96 A Ê from their carrier atom.…”

“…The ®rst crystal structure determination of a TAG with unequal fatty-acid chain lengths was published by Doyne & Gordon (1968). They determined the crystal structure of CL Br C, a heavy-atom analogue of CLC, which is a C n C n + 2 C n -type (n = even) TAG.…”

Postulated scheme forβ crystal structures of mixed palmitic‐stearic triglycerides

“…Doyne and Gordon (1), in a partial crystal structure determination of the /3-form of 2-11-bromoundecanoyl-1,1'-dicaprin, found a molecular packing different from that of tricaprin (2) and trilaurin (3). The difference, arising from the difference in chain length relationships within a molecule, was particularly manifest by the arrangement of the methyl groups at the chain ends.…”

Fractionation of lipids for use in food

“…Although information about crystal structures of fats and complex lipids is fundamental for various fields, the structural analysis of those compounds often reveals difficulty in preparing single crystals suitable for X-ray diffraction analysis and for full three-dimensional determination (Larsson, 1964;Jensen and Mabis, 1966;Doyne and Gordon, 1968;Gibon et al, 1984;Culot et al, 2000;Sato et al, 2001a;Van Langevelde et al, 2000).…”