Influence of Changes in the Central Core on the Mesomorphic Properties of 4,4’ -Dialkoxybenzalazines and Derivatives (II)

Two homologous series of benzalazines were synthesized, namely, the 4,4′-di-n-alkoxy-2-hydroxybenzalazines and 4,4′-di-n-alkoxybenzalazines, and their mesomorphic properties were studied. All the prepared compounds of these series exhibit mesomorphism and some of them possess crystalline polymorphism also. A comparative study of the mesomorphic properties of these series with those of 4,4′-di-n-alkoxy-2,2′-dihydroxybenzalazines and the analogous α,α'-dimethylbenzalazines was carried out in order to determine the influence of the central core on the mesomorphic properties.