Novel compounds, 4-alkyl-cyclohexenes having at the 1-position thereof p-cyanophenyl group or 4'-cyano-4-biphenylyl group, expressed by the general formula ##STR1## wherein R represents a straight alkyl group having 1.about.9 carbon atoms and n represents 1 or 2; methods for producing the same; and nematic liquid crystal (L.C.) compositions comprising at least one member selected from the group consisting of said compounds, are provided. Said compounds having a cyclohexene ring have a lower viscosity than conventional L.C. compounds, and have effectivenesses of short response time when applied to L.C. display apparatus; superior compatibility with other L.C. compounds to form convenient L.C. mixture; and no need of separating cis- and trans-forms in the midway step of the preparation as in the prior art.
本发明提供了一种新型化合物,即在其1-位置具有对
氰苯基或4'-
氰基-4-
联苯基的4-烷基-
环己烯,其通式表示为##STR1##其中R代表1~9个碳原子的直链烷基,n代表1或2;以及制备它们的方法和液晶(L.C.)组合物,其中至少包括所述化合物中的一种。这些具有
环己烯环的化合物比传统的L.C.化合物具有更低的粘度,并且在应用于L.C.显示装置时具有短响应时间的效果;与其他L.C.化合物相比具有更好的兼容性,形成方便的L.C.混合物;在制备过程中无需像先前的技术中那样分离顺式和反式形式。