Tetra-2,3-pyrazinoporphyrazines with peripherally appended pyridine rings. 21. Mono- And pentanuclear FeII complexes: Solid state and solution studies
New FeII complexes of formula [Py8TPyzPzFe] •xH2O, its bis-pyridine adduct [Py8TPyzPzFe(py)2] •xH2O, the pentanuclear species [(MCl2)4Py8TPyzPzFe] •xH2O (M = PdII, PtII) and the bis-DABCO adducts [Py8TPyzPzFe(DABCO)2] •11H2O and [(PdCl2)4Py8TPyzPzFe(DABCO)2] •H2O (Py8TPyzPz = octapyridino-tetrapyrazinoporphyrazinato dianion; DABCO = 1,4-diazabiciclo[2.2.2]octane) were synthesized and characterized by elemental and thermogravimetric analysis, IR and UV-vis spectroscopy, with added studies on the starting complex [Py8TPyzPzFe] •xH2O regarding magnetic and electrochemical behavior.