synthesized new chiralliquid crystalline (LC) organic radical compounds 2 and 3, which are the derivatives of the previously reported compounds 1 containing a chiralcyclicnitroxideunit and an ester group in the mesogen core, and their ferroelectric properties have been studied. The enantiomerically enriched (2S,5S)-2 and (2S,5S)-3 showed an SmC * phase for which their ferroelectric properties such as spontaneous