A novel liquid crystal compound having an intermediate group of a cis-1,4-substituted 2-butenyl group, low viscosity and a broad mesomorphic temperature range is provided, which compound is expressed by the following formula: ##STR1## wherein R.sup.1 represents an alkyl group of 1 to 10 carbon atoms, n represents 1 or 2, X represents a hydrogen atom, an alkyl group, a halogen atom, a cyano group, an alkoxy group, a methyl group substituted by 1 to 3 halogen atom(s) or a trihaloalkoxy group, and Y and Y' each independently represents a hydrogen atom, or a halogen atom.
提供了一种新型液晶化合物,具有一个顺式-1,4-取代的
2-丁烯基中间基团,低粘度和宽广的介温范围,该化合物由以下公式表示:##STR1## 其中R.sup.1表示1至10个碳原子的烷基,n表示1或2,X表示氢原子、烷基、卤素原子、
氰基、烷氧基、1至3个卤素原子取代的甲基基团或三卤代烷氧基,Y和Y'各自独立表示氢原子或卤素原子。