Niedrigschmelzende p-Alkyl-p′-alkoxy- und p-Alkylp′ -acyloxy-azobenzole / Low melting p-alkyl-p′-alkoxy- and p-alkyl-p′-acyloxy-azobenzenes

More than 30 new unsymmetric disubstituted, enantiotropic nematic azobenzenes are described. In contrast to the high melting symmetric disubstituted liquid crystalline azobenzenes they partly have melting points only a little bit higher than room-temperature and nematic ranges of up to 34 °C. They represent an interesting new class of nematic liquid crystals.