Polarizability constant of iodine as substituent in correlation analysis

Correlation equations describing the influence of inductive, resonance, polarizability, and steric effects of the substituents on the parameters of IR, NQR, NMR, and Mossbauer spectra as well as ionization and activation energies have been considered for 13 reaction (indicator) series. Using the obtained equations, we have calculated the earlier unknown polarizability constant of iodine substituent (σα =–0.71). The relation between the σα constant of substituent X and polarization of atoms of X has been found for the CH3X (H, F, Cl, Br, I) series.