Solvothermal synthesis of [Mn(en)(3)](2)[Mn-4(en)(9)(SbSe4)(4)]center dot 2H2O: the first example of a selenoantimonate(v) acting as a ligand in a transition-metal complex

Reaction of elemental manganese, antimony and selenium under mild solvothermal conditions yields the complex anion [Mn-4(en)(9)(SbSe4)(4)](4-), the first example of a transition-metal complex with SbSe43- anions acting as ligands; the anions are coordinated in a terminal position as well as a bridging ligand.