A fluorinated compound having a formula: ##STR1## R.sub.1 is hydrogen or alkyl having up to 12 carbon atoms; R.sub.2 is selected from hydrogen, alkyl having up to 12 carbon atoms, alkoxy having up to 12 carbon atoms, ##STR2## wherein R.sub.3 is hydrogen or alkyl having up to 12 carbon atoms, and wherein R.sub.4 is hydrogen, alkyl having up to 12 carbon atoms or alkoxy having up to 12 carbon atoms; ##STR3## represents a cyclohexane ring which is in the trans configuration if 1, 4-disubstituted; ##STR4## represents a benzene ring; each of X, Y and Z independently represents hydrogen or fluorine in one or more of the lateral benzene ring positions, provided that at least one of X, Y and Z is present representing fluorine; n=0 or 1 provided that when n=0 ##STR5## and R.sub.1 is alkyl; with the proviso that in Formula I when n is 1 and ##STR6## where R.sub.1 is n-alkyl and R.sub.2 is n-alkyl or n-alkoxy the total number of carbon plus oxygen atoms in the two groups R.sub.1 and R.sub.2 is less than 10.
一种含
氟化合物,其
化学式为:##STR1## R.sub.1为氢或碳数不超过12的烷基;R.sub.2选自氢、碳数不超过12的烷基、碳数不超过12的烷氧基、##STR2## 其中R.sub.3为氢或碳数不超过12的烷基,而R.sub.4为氢、碳数不超过12的烷基或碳数不超过12的烷氧基;##STR3## 代表一个
环己烷环,如果1,4-二取代,则处于顺式构象;##STR4## 代表一个苯环;X、Y和Z中的每一个都独立地代表苯环侧位上一个或多个氢或
氟,其中至少有一个代表
氟;n=0或1,如果n=0,则##STR5## 而R.sub.1为烷基;在式I中,当n为1且##STR6## 其中R.sub.1为n-烷基,R.sub.2为n-烷基或n-烷氧基时,R.sub.1和R.sub.2两个基团中碳和氧原子的总数小于10。