Ionization energy of core electrons in haloderivatives. Polarization effect in F-, Cl-, Br-, and I-centered radical cations

Ionization energies of core electrons of the fluorine, chlorine, bromine, and iodine atoms in 27 reaction series of haloderivatives depend on the inductive, the resonance, and the polarization effect; the latter has not been considered before. The contribution of the polarization effect varies in a broad range and in some cases exceeds 50%. Halocentered radical cations formed by the abstraction of the core or valence electron from the molecule slightly differ in the polarization effect value.