Resumen

BARTULIN, J.; RAMOS, M.L.  y  ZUNZA, H.. PROPIEDADES MESOMORFICAS DE 1-(4-n-ALCOXIFENIL)-3-(5-n-ALQUIL-2-TIENIL)-1,3-PROPANODIONAS Y DE SUS DERIVADOS ISOXAZOLICOS Y PIRAZOLICOS. Bol. Soc. Chil. Quím. [online]. 1999, vol.44, n.3, pp. 375-384. ISSN 0366-1644.  doi: 10.4067/S0366-16441999000300015.

The liquid crystalline behavior of 1-(4-n-alkoxyphenyl)-3-(5-n-propyl-2-thienyl) propan-1,3-diones (series R_nO₂R₃) and 1-(4-n-alkoxyphenyl)-3-(5-n-hexyl-2-thienyl) propan-1,3-diones (series R_nO₂R₆) and the isoxazole and pyrazole derivatives for the number of carbon atoms in the alkoxy chain from thee to nine, has been studied by optical microscopy, DSC and X-ray techniques. Series R_nO₂R₃ did not show mesophases, two members of the series R_nO₂R₆, with six and eight carbon atoms in the alkoxy chain shows monotropic nematic mesophases. The majority of the isoxazole and pyrazole compounds show mesogenic property, isoxazole nematic and smectic C phase and pyrazole smectic A. The synthesized 1-methyl substituted pyrazole did not show mesophases

Palabras clave : Mesomorphic b-diketones; nematic and smectic C isoxazole; smectic A pyrazole.