Synthesis and mesomorphic properties of some disubstituted unsymmetrical phenyl-1,2,4,5-tetrazines

Abstract

The synthesis of unsymmetrical phenyl-1,2,4,5-tetrazines containing a cyano group either on the phenyl ring (1a) or the tetrazine ring (11a, 11b) has been accomplished by the introduction of the cyano group after formation of the tetrazine ring. The mesomorphic, solubility and absorption properties of these tetrazines and a series of alkoxy tetrazines (12a–d) has been studied. The compounds containing the cyano group on the tetrazine ring showed smectic A phases while nematic phases were observed in some of the alkoxy tetrazines.