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A quantum chemistry method was developed to calculate the Hammett substituent constants of various organic radicals. These newly obtained constants allow,for the first time,the quantitative analysis of the electron demand of organic radicals. Calcula-tions reveal that the electron demand of organic radicals varies dramatically. It was demonstrated that the Hammett relationship of bond dissociation energies is determined only by the change of electron demand during the homolysis process.
These new obtained constants allow, for the first time, the quantitative analysis of the electron demand of organic radicals. Calcula-tions reveal that the electron demand of organic radicals. varies dramatically. It was said that the Hammett relationship of the bond dissociation energies is determined only by the change of electron demand during the homolysis process.