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The synthesis and transition temperatures of ester derivatives of 2-fluoro-4-hydroxy- and 3-fluoro-4-hydroxybenzonitriles also incorporating aliphatic ring systems

✍ Scribed by Stephen M. Kelly; Hanspeter Schad

Publisher
John Wiley and Sons
Year
1984
Tongue
German
Weight
460 KB
Volume
67
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The synthesis and liquid‐crystal transition temperatures of forty ester derivatives of 2‐fluoro‐4‐hydroxybenzonitrile and 3‐fluoro‐4‐hydroxybenzonitrile are reported. The esters contain the trans‐1,4‐disubstituted cyclohexane or the 1,4‐disubstituted bicyclo[2.2.2]octane rings (some contain an additional phenyl ring). Many of the novel F‐substituted esters exhibit substantially higher nematic‐isotropic transition temperatures than the corresponding unsubstituted esters. The order of clearing points of these laterally substiuted esters differing only in the presence of a benzene ring and the above‐mentioned rings id established.

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