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A new series of 1,1′-disubstituted ferrocene compounds of the type [(η5-C5H4(CH2) n OC6H4C6H4CN]2Fe (3a–d, n = 5, 6, 8, 11) incorporating a variable length alkyloxy cyanobiphenyl unit has been prepared and their mesomorphic properties have been investigated. Compounds 3b, c and d exhibit a thermotropic smectic C phase and 3c also exhibits a monotropic smectic A phase over a fairly wide range near ambient temperature.
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