Hexa- and nonanuclear manganese clusters based on the chelating ligand 2-pyridinealdoxime

A hexanuclear Mn(II) complex solely based on oxime bridges [Mn6(Hpao)4(pao)8] (ClO4)4 (1) and a mixed-valent Mn(II)-Mn(III)-Mn(IV) nonanuclear complex [Mn9(μ4-O)2(μ3-O)4(CH3CO2)4(pao)8(Hpao)2] · 4H2O (2) are obtained from the reaction of simple Mn(II) salts with syn-2-pyridinealdoxime (Hpao).