摘要:
A trans-dihalogenostilbene compound of the formula: ##STR1## wherein each of A.sup.1 to A.sup.4, which are independent from one another, is a trans-1,4-cyclohexylene group or a 1,4-phenylene group, which is unsubstituted or substituted by one or more halogen atoms, methyl groups or nitrile groups and in which one or more CH groups may be substituted by nitrogen atoms, and one or more CH.sub.2 groups may be substituted by oxygen atoms or sulfur atoms; each of B.sup.1 and B.sup.2, which are independent from each other, is a 1,4-phenylene group, which is unsubstituted or substituted by one or more halogen atoms, methyl groups or nitrile groups and in which one or more CH groups may be substituted by nitrogen atoms; each of Y.sup.1 to Y.sup.4, which are independent from one another, is --COO--, --O--, --OCO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 --, --CH.dbd.CH--, --OCH.sub.2 --, --CH.sub.2 O--, --CH.dbd.N--, --NO.dbd.N--, --N.dbd.ON--, --C.tbd.C--, --N.dbd.N-- or a single bond; each of X.sup. 1 and X.sup.2, which are independent from each other, is a fluorine atom, a chlorine atom, a bromine atom or a trifluoromethyl group; each of m, n, p and q is 0 or 1; and each of R.sup.1 and R.sup.2, which are independent from each other, is a C.sub.1 -C.sub.10 alkyl group, a halogen atom, a nitrile group or an isothiacyanate group, provided that in the case of the alkyl group, an oxygen atom may be interposed in a carbon-carbon bond of the group or in a carbon-carbon bond between this group and the adjacent ring, and in a case where R.sup.1 or R.sup.2 is the alkyl group, some of hydrogen atoms in the group may be substituted by fluorine atoms.
摘要翻译:下式的反式二卤代茋化合物:其中彼此独立的A1至A4各自为反式-1,4-亚环己基或1,4-亚苯基,其为 未被取代或被一个或多个卤素原子,甲基或腈基取代,并且其中一个或多个CH基团可以被氮原子取代,并且一个或多个CH 2基团可以被氧原子或硫原子取代; 彼此独立的B1和B2中的每一个是1,4-亚苯基,其未被取代或被一个或多个卤素原子,甲基或腈基取代,并且其中一个或多个CH基团可被取代 通过氮原子; 每个Y 1至Y 4彼此独立地为-COO - , - O - , - OCO - , - CH 2 CH 2 - , - CH 2 - , - CH = CH - , - OCH 2 - , - CH 2 O- = N - , - N = N - , - N = ON-, - C 3BOND C - , - N = N-或单键; X 1和X 2各自独立地为氟原子,氯原子,溴原子或三氟甲基; m,n,p和q各自为0或1; 并且R 1和R 2各自独立地为C1-C10烷基,卤素原子,腈基或异硫氰酸酯基,条件是在烷基的情况下,可以插入氧原子 在该基团的碳 - 碳键或该基团和相邻的环之间的碳 - 碳键中,并且在R 1或R 2为烷基的情况下,该基团中的一些氢原子可被氟原子取代 。