Phosphatidylcholines containing an α-branched palmitic acid ester linked to position C2 of the glycerol backbone were synthesized and characterized using differential scanning calorimetry and X-ray diffraction. As the length of the sidegroup substituted on the palmitic acid chain is changed, the calorimetric parameters pass through a minimum. The polymorphic behaviour is different when the sidegroup is larger, or smaller, than propyl. ...
