The coordination of pyridine molecules with tetrapyrrole macrocyclic complexes of manganese(III) was studied depending on the ligand structure. The coordination in toluene was ended in all cases in the formation of 1 : 1 complexes, the structure of which was established using MALDI-TOF mass spectrometry and 1H NMR spectroscopy. The numerical values of the stability constants of the coordination complexes were found to vary from 0.16 to 104 L/mol, depending on the nature of the axial anion in the manganese(III) complex, the structure of the tetrapyrrole macrocycle, and the functional substitution in the macrocycle. The data obtained are useful for selecting the structures in the design of metal porphyrin-based hybrid materials by the immobilization and supramolecular chemistry methods.
