X-ray photoelectron spectra of organoelement compounds and polarizability effect

The literature data on substituent influence on the core-electron binding energies E for K, B, Al, Si, Ge, Sn, P, Mo, Mn, Co, and Pt central atoms obtained mainly from X-ray photoelectron spectra have been analyzed for 22 series of the organoelement compounds. It was established for the first time that the E values depend not only on the inductive and resonance effects but also on the polarizability of substituents. The polarizability effect is caused by an electrostatic attraction between the positive charge on the central atom and the dipole moments induced by this charge in the substituents. The polarizability contribution ranges from 2 to 56%.