The dielectric properties of solutions of the liquid crystals with (CH₂) spacers and nitrile groups in molecules in weakly polar nematic diluent were studied. In the frequency range of a.c. electric field (10²-10⁸)Hz the dispersion of complex dielectric permitivities ε_| in nematic phase were investigated. From the dielectric spectra of ε_|, the relaxation frequencies f_Rwere obtained for each of the investigated substances. It was shown that f_R increases with the (CH₂) spacers length of the central alkyl chains of molecules.