Syntheses of Diiodo and Triiodo Derivatives of 1,2,3-Trimethylbenzene (<i>Hemimellitene</i>) and 1,2,4-Trimethylbenzene (<i>Pseudocumene</i>). A Convenient Use of Polyiodo Derivatives for the Characterization of Polyalkylbenzenes and Their Derivatives
作者:Hitomi Suzuki、Yasuhiro Haruta
DOI:10.1246/bcsj.46.589
日期:1973.2
A complete set of diiodo and triiodo derivatives of 1,2,3-trimethylbenzene and 1,2,4-trimethylbenzene has been prepared and their physicalproperties are recorded. Use of polyiodo derivatives as a means for characterizing polyalkylbenzenes and their derivatives has been proposed.
The invention relates to the compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds which contains at least one compound of the formula I
in which R
1
, ring A
1
, L
1
, L
2
, L
3
, L
4
, L
5
, L
6
, L
7
, L
8
, Z
1
and m have the meanings indicated in claim
1
and to the use of the LC mixtures in electro-optical displays, especially for the self-aligning VA mode.