OXIDATIVE CLEAVAGE OF TRIETHYLENETETRAMINE (TRIEN) TO YIELD DIETHYLENETRIAMINE (DIEN) - STRUCTURE OF THE MN-II/MN-III HEPTANUCLEAR COMPLEX [MN7(TRIEN)2(DIEN)2O4(OAC)8](PF6)4.2H2O

Two [Mn4(mu-3-O)2] moieties with butterfly structure, which are coupled via a common Mn atom, are present in the cation of the title compound (structure with coordinated N (black-circle) and O atoms (black-circle) shown below). The complex cation, which contains six Mn(III) centers and one Mn(II) center, is formed in the reaction of manganese(III) acetate and triethylenetetramine in methanol. During the reaction a part of the tetramine ligand is cleaved oxidatively with formation of diethylenetriamine.