Thermodynamic Properties and X-ray Studies of the Homologous Series Arylthiophene Azoles

Abstract

In this work is described the thermodynamic properties and structural data of the homologous series 3–5 (4-alkoxyphenyl)5(2-propylthienyl) and 3–5(4-alkoxyphenyl)5(2-hexylthienyI) -pyrazoles and -isoxazoles. The series isoxazoles exhibit nematic phases and compounds with greater number of carbon atoms in the alkoxy chains also exhibit the smectic C phase. In contrast, the pyrazoles series exhibit only the smectic A phase.

Key Words:

• Thermodynamic properties
• X-ray studies
• arylthiophene azoles
• smectic C.