The Tm and Ti of compounds 18 is higher than the compounds 16.The Tm and Tj of compounds 18 II and 16 II which have the trans conformation is higher than those of compounds 18 I and 16 I having cis conformation.

• 化合物 16和 18中，反式构型的化合物 16II和 ISll的熔点和液晶态的清亮点均高于顺式构型的化合物 161和 ISI。