Bis(1,4,7-triaza­cyclo­nona­ne-κ3 N)manganese(II) di-μ-diselenido-bis­[selenidoarsenate(III)].

The title compound, [Mn(C6H15N3)2][As2Se6], contains a sandwich-like centrosymmetric complex cation with two tridentate 9-aneN3 (1,4,7-triaza­cyclo­nona­ne) ligands, which coordinate the MnII atom in an octa­hedral manner. AsSe3 pyramids are linked by two Se—Se bonds into the centrosymmetric chair-shaped six-membered ring of the [As2Se6]2− counter-anions. [ABSTRACT FROM AUTHOR]