B. Lundén
Dec 15, 1976
Citations
0
Influential Citations
12
Citations
Journal
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
Abstract
12-D-Hydroxyoctadecanoic acid methyl ester is monoclinic (P21) with a=8.380, b=4"861, c= 25.59 A and fl= 102.18 °. The molecules are arranged 'head-to-tail' in single layers in which the chain axes are tilted 69.5 ° to the end-group contact planes. The hydrocarbon chains pack according to the orthorhombic subcell 02 with a~= 4.86, bs= 7.87 and c~= 2.54 A,. The hydroxyl groups are accommodated into the chain matrix without any major local distortion but by a general expansion of the chain packing. The bs axis is thus 0.46 A longer than in hydrocarbons. The hydroxyl groups link the molecules by hydrogen bonds along the twofold screw axis.