Specific Heat of Organic Compounds and Polarization Effect

Literature data have been considered from the viewpoint of the influence of substituents on the mole specific heats C_p at constant pressure for 14 series of organic compounds. Using the correlation-analysis method, it has been shown for the first time that experimental and calculated C_p values depend not only on the inductive, resonance, and steric influence, but also on the polarization effect of variable substituents associated with a constant reactive center. In individual cases the polarization effect has the most significant impact on C_p.