Abstract
The thermodynamics of axial coordination reactions of para-substituted tetraphenylporphinatoiron(III) chloride, ( p-X)TPPFeCl, with various ligands (L = Im (imidazole), MeIm (2-methylimidazole), EMIm (2-ethyl-4-methylimidazole) in dichloromethane solvent have been studied. ▪ The steric and electronic effects of the three axial ligands are compared, and the effect of para-substituents on the phenyl rings is also discussed. Some linear relationships can be derived theoretically if Hammett relationships, isokinetic and isoequilibrium relationships show up in the system of similar reactions. These linear relationships have been verified by our experiments.
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