The present invention provides a novel pyrimidine derivative having a large .DELTA..epsilon. value and a low viscosity, and affording a liquid crystal composition having a high clearing point and a low threshold voltage value without raising its viscosity when the derivative is mixed with other liquid crystal compositions or liquid crystal compound. The pyrimidine derivative is a 5-[2'-(trans-4"-alkylcyclohexyl)ethyl]-2-(3,4-difluorophenyl)pyrimidine expressed by the formula ##STR1## wherein R represents a linear alkyl group having 1 to 10 carbon atoms.
本发明提供了一种新型
嘧啶衍
生物,具有较大的.DELTA..epsilon.值和低粘度,并在将该衍
生物与其他液晶组分或液晶化合物混合时,不会提高其粘度且可提供具有高清晰点和低阈值电压值的液晶组成物。该
嘧啶衍
生物是一种5-[2'-(trans-4"-烷基环己基)乙基]-2-(3,4-二
氟苯基)
嘧啶,其
化学式为##STR1##其中R代表具有1到10个碳原子的线性烷基。