Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry


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Mesomorphic properties of a new homologous series: 2-(4├ó┬?┬?-Nalkoxy benzoyloxy)-naphthyl-1-azo-4├ó┬?┬?├ó┬?┬?-nitro benzenes

Author(s): HR Prajapatib and AV Doshia

New homologous series with -COO- and -N=N- as central group have been synthesized by the treatment of 4-n-alkoxy benzoyl chloride with 2-Hydroxy - naphthyl – 1 – azo – 4’ – nitro benzene. All the homologues of the series are enantiotropically nematogenic without exhibition of smectic mesophase. The texture of nematic mesophase is of threaded type. Well known odd-even effect is clearly observed in the nematic isotropic transition curve. Thermal stabilities and liquid crystalline properties are compared with other structurally identical homologous series. Transition temperatures are observed through hot stage polarizing microscope. Analytical data support the structure of molecules.


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