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Abstract
Chiral liquid crystalline compounds (S)-MHOBS5 and (S)-MHOBS6 from a new homologous series of the (S)-(+)-4-(1-methylheptyloxy)biphenyl 4-alkylthiobenzoates, abbreviated (S)-MHOBSn (where n denotes the number of carbon atoms in the alkyl chain) in which the chiral branched chain is attached to the biphenyl have been studied by DSC calorymetry, dielectric spectroscopy and electro-optic methods. (S)-MHOBS5 and (S)-MHOBS6 possesses a rich phase polymorphism, including enantiotropic ferroelectric smectic C phase (SmC*).