Abstract
Specific interactions of parts of molecules have led to new structural models in the field of liquid crystals. The polar cyano group, may for example cause a “bi-lagered” or “partially bi-layered” structure of the smectic A type. Hydrogen bridges in carboxylic acids yield dimers which produce a “bi-layered” structure in the smectic C phase1. A variation of this concept seems to be realized in 2-(trans 4-n-alkylcyclo-hexyl)-propan-1, 3-diols.