Liquid crystal benzene derivatives.

摘要

Benzene derivatives useful as components of liquid crystal compositions are of the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="15" wi="82" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R represents hydrogen or C<Sub>1</Sub> to C<Sub>10</Sub> alkyl; R' represents hydrogen or C, to C<Sub>10</Sub> alkyl or alkoxy; and
<Chemistry id="chema02" num="0002"><Image id="ia02" he="16" wi="31" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>represents
<Chemistry id="chema03" num="0003"><Image id="ia03" he="13" wi="32" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>or
<Chemistry id="chema04" num="0004"><Image id="ia04" he="19" wi="37" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>In general, the derivatives exhibit low positive dielectric anisotropies; have broad liquid crystal temperature ranges; and in particular, have high liquid crystalline-transparent points, and yet have low viscosities.