(SP-4-1)-Bis{aqua­[(1R,2R)-N,N′-bis­(salicyl­idene)­cyclo­hexane-1,2-di­amine-κ⁴O,N,N′,O′]­manganese(III)}-di-μ-cyano-κ⁴N:C-[di­cyano­nickel(II)]

The title compound, [Mn₂Ni(C₂₀H₂₀N₂O₂)₂(CN)₄(H₂O)₂], is the first chiral trinuclear complex having an Mn^III—NC—Ni^II—CN—Mn^III unit. A pair of the trans sites of [Ni(CN)₄]²⁻ links two Mn^III units. The Mn^III ion has a pseudo-octahedral coordination geometry with the four donor atoms of the tetradentate chiral Schiff base forming the equatorial plane, and with a bridging cyanide and an aqua ligand at the axial positions.

Diaqua­[(1R,2R)-N,N′-bis­(3,5-dibromo­salicylidene)cyclo­hexa­ne-1,2-diamine-κ⁴O,N,N′,O′]manganese(III) perchlorate dihydrate

The crystal structure of the title compound, [Mn(C₂₀H₁₆Br₄N₂O₂)(H₂O)₂](ClO₄)·2H₂O, has been determined. The mononuclear complex affords an elongated octa­hedral MnN₂O₄ coordination geometry with the four donor atoms of the tetra­dentate chiral Schiff base in the equatorial plane and with two aqua ligands in axial positions with Mn—O = 2.278 (9) and 2.269 (10) Å.