The novel silylalkyl or silylalkenyl compounds correspond to the general formula (I) ##STR1## Here the symbols A.sup.1, A.sup.2, A.sup.3 denote aromatic or heteroaromatic molecular units such as 1,4-phenylene or pyrimidine-2,5-diyl which are combined via a single bond (for k, m=0) or via functional groups M.sup.1,M.sup.2 such as CO--O or CH.sub.2 --O; j, k, l, m, n are zero or 1 (j+l+n=2 or 3). The radicals R.sup.2, R.sup.3, R.sup.4, R.sup.5 are hydrogen or alkyl/alkenyl, cycloalkyl, and the radicals R.sup.6, R.sup.7, R.sup.8 have a comparable meaning (hydrogen); R.sup.1 is alkyl/alkenyl or one of the substituents known from LC chemistry such as an .alpha.-haloalkanoic radical. In some cases compounds have wide and polymorphous liquid crystalline phases.
这个小说中的
硅烷基或
硅烯基化合物对应于一般公式(I)##STR1## 这里符号A.sup.1,A.sup.2,A.sup.3表示芳香或杂环芳香分子单元,例如1,4-苯基或
嘧啶-2,5-二基,它们通过单键(对于k,m=0)或通过功能基M.sup.1,M.sup.2(例如CO-O或CH.sub.2-O)组合; j,k,l,m,n为零或1(j+l+n=2或3)。基团R.sup.2,R.sup.3,R.sup.4,R.sup.5为氢或烷基/烯基,环烷基,基团R.sup.6,R.sup.7,R.sup.8具有相似的含义(氢); R.sup.1是烷基/烯基或LC
化学中已知的取代基之一,例如.alpha.-卤代烷酸基。在某些情况下,化合物具有广泛且多态的液晶相。