Abstract Three homologous series of α, α′-Dimethylbenzalazines, have been synthesized: 4, 4′-Dialkoxy-α, α′-Dimethylbenzalazines, 4, 4′-dialkoxy-2, 2′-dihydroxy-α, α′- Dimethylbenzalazines, and 4, 4′-dialkoxy-2-hydroxy-α, α′-Dimethylbenzalazines. The influence of molecular structure on the mesomorphic properties was studied. Mesomorphic properties and phase transitions were determined using a polarizing hotstage microscope ...