Mesogenic Homologous Series : 4-Isopropoxyphenyl- 4' -n-alkoxycinnamates and Binary Systems Comprising the Homologues of this Series

Applied Chemistry Department, Faculty of Technology and Engineering. M. S. University of Vadodara, Vadodara-390 001 Central Laboratory), lndian Petrochemicals Corporation Limited P. O. Petrochemicals, Vadodara-391 346 Manuscript received 27 October 1994 accepted 16 February 1995 Twelve member of the homologous series-A have been systhesised. First two memhers are non-mesogenic. The nematic mesophase n-Propoxy to n-heptyloxy derivatives exhibit only nematic phase. n-Octyloxy and n-decyloxy derivatives exhibit smectic and nernatic phases. n-Dodecyloxy to n-hexadecyloxy derivatives exhibit only smectic phase. Seven binary systems comprised of homologues of series-A hale been studied. The non-mesogens induce mesomorphism in a few binary systems. Other binary systems, where both the components are mesogens, exhibit normal behaviour of mesogenic binary systems. Results indicate that even though homologues of series:A contain branched alkyl chain, the binary systems do not exhibit pronounced decrease in melting behaviour