Enthalpies of formation of phenylaminyl radicals

Enthalpies of formation (Δ f H ∘ ) for 31 radicals of the series of substituted Ph-N ∙ H and Ph-N ∙ -Ph were determined for the first time. The calculations were based on the dissociation energies of N-H bonds in the corresponding molecules and their Δ f H ∘ . A quantitative “structure—enthalpy of formation” correlation was established for these radicals within the framework of the additive-group approach. The Δ f H ∘ of radicals were analyzed and the most reliable values were suggested.