| abstract |
5,7-Difluoro-1,2,3,4-tetrahydronaphthalene derivatives of the formula (I) n n R.sup.1 (-A.sup.1 -M.sup.1).sub.a (-A.sup.2 -M.sup.2).sub.b -B(-M.sup.3 n n -A 3 ) c (-M 4 -A 4 ) d -R 2 (I) n in which n B is n and ##STR1## R 1 (-A 1 -M 1 ) a (-A 2 -M 2 ) and (-M 3 -A 3 ) c (-M 4 -A 4 )R 2 denote mesogenic radicals are suitable as components of liquid-crystal mixtures, in particular ferroelectric. |