92: 138962w Low transition temperature liquid crystalline amines incorporating the trans-1,4-substituted cyclohexane ring system. MacMillan, John H., Labes, M.M., (Dept. Chem., Temple Univ., Philadelphia, PA 19122 USA). Mol. Cryst. Liq. Cryst. 1979, 55(1-4), 61-70 (Eng).

A series of para substituted trans-4-alkylcyclohexylbenzylamines was prepd. and examd. for mesomorphic properties. The n-pentyl deriv. showed monotropic smectic behavior while the n-heptyl deriv. was an enantiotropic smectic. These are examples of low temp. liq. crystals incorporating an amino functionality. While the p-(trans-4-alkylcycloxexyl)anilines were not liq. crystalline, N-alkyl substituted-p-(trans-4-pentylcyclohexyl)anilines, such as N- (butyl)-p-(trans-4-pentylcyclohexyl) aniline exhibit low-temp. mesophases. A strong tendency to spontaneous homeotropic alignment was found in the nematic members of this series. Chem. Abstr. Vol 92, 138962w

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