A thermally induced low-temperature intramolecular redox reaction of bis(pyridine)silver(I) permanganate and its hemipyridine solvate

Among the known three pyridine complexes of silver permanganate, i.e. [Agpy2]MnO4 (1), [Agpy2.25]MnO4 or 7[Agpy2]MnO4[Agpy4]MnO4 (2) and [Agpy2]MnO40.5py (3), compounds (1) and (2) were studied by means of thermal analysis and TG-MS methods. Presuming identical structural motifs for the Agpy2MnO4 blocks in (1) as it has been found in its solvate (3) by single-crystal diffraction, α-C–H...O–Mn H-bonded structures are responsible for a thermally induced low-temperature intramolecular redox reaction observed for the first time between the [Agpy2]+ cation and permanganate anion.