Kinetic Regularities of Slow Proton Transfer from β-Substituted Porphyrazines to Organic Bases

Abstract

The regularities of intermolecular proton transfer from β-substituted porphyrazines to dimethylsulfoxide, cyclic and acyclic nitrogen-containing bases in inert solvents are considered. We found that the process rates are unusually low. We showed that the acidic properties of a porphyrazine macrocycle, the proton-acceptor ability of a base, and the dielectric constant of the environment influence the kinetic parameters of acid–base interaction. The structure and the stability of proton transfer complexes of porphyrazines are discussed.