申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US04490305A1
公开(公告)日:1984-12-25
Liquid-crystalline halogen compounds of the formula ##STR1## wherein the ring A is 1,4-phenylene or trans-1,4-cyclohexylene; R.sub.1 is alkyl or alkoxy each of 1 to 12 carbon atoms or, when A is 1,4-phenylene, is also cyano; R.sub.2 is alkyl or alkoxy each of 1 to 12 carbon atoms or, when A is 1,4-cyclohexylene, is also chlorine or bromine; and X is fluorine, chlorine or hydrogen; with the proviso that at least one of the substituents R.sub.2 and X is a halogen atom are valuable components in liquid-crystalline dielectrics.
式为##STR1##的液晶卤素化合物,其中环A为1,4-苯撑基或反-1,4-环己撑基;R.sub.1为1至12个碳原子的烷基或烷氧基,或者当A为1,4-苯撑基时,也可以是氰基;R.sub.2为1至12个碳原子的烷基或烷氧基,或者当A为1,4-环己撑基时,也可以是氯或溴;X为氟、氯或氢,但至少有一个R.sub.2和X的取代基为卤素原子,这些化合物是液晶介电体中有价值的组分。