LIQUID-CRYSTALLINE COMPOUNDS .52. HEXAALKYNYLTRIPHENYLENE - A NEW TYPE OF NEMATIC-DISCOTIC HYDROCARBON

被引：97

作者：

PRAEFCKE, K

KOHNE, B

SINGER, D

机构：

[1] Institut für Organische Chemie, Technischen Universität, Berlin, D-1000

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1990年 / 29卷 / 02期

关键词：

D O I：

10.1002/anie.199001771

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Stable mesophase regions of 80 K (R = pentyl) and 54 K (R = heptyl) were found for the highly unsaturated, large monotropic hydro‐carbons 1, obtained by repetitive Pd‐catalyzed alkynylation of hexabromotriphenylene in a one‐pot reaction. As already observed for other multi(phenylethynyl)arenes with ND phases, these phases exhibit very small transition enthalpies ΔHND→I for the clearing process (0.2 kJmol−1). (Figure Presented.) Copyright © 1990 by VCH Verlagsgesellschaft mbH, Germany

引用

页码：177 / 179

页数：3

共 17 条

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