S. Haddawi et al., STABILIZATION AND DESTABILIZATION OF THE S(A) PHASE IN MIXTURES OF TROBENZYL-2,5-BIS(4-N-ALKYLOXYBENZOYLOXY)BENZOATES, Crystal research and technology, 29(5), 1994, pp. 745-757
trobenzyl-2,5-bis(4-n-alkyloxybenzoyloxy)benzoates exhibit S(A) phases
which are characterized by an antiparallel packing of the molecules a
nd a partial intercalation of the terminal alkyl chains. In binary sys
tems of selected rod-like components the S(A) mixed phase can be stabi
lized or destabilized depending on the molecular length of the rod-lik
e molecules. This unusual behaviour is mainly due to steric interactio
n and can be interpreted by a simple packing model.