Anisotropy of static electric permittivities of the homologous series of p-cyano-p’-alkylphenylcyclohexanes (PCH) have been measured as a function of temperature in isotropic and nematic phases. The mean square effective dipole moment components along the principal directions of a liquid crystal have been determined. The Kirkwood correlation factors g((i)), obtained from Maier and Meier equations, exhibit the odd-even alteration within the studied series. The g-factors values have been interpreted in terms of an anti-parallel association.