Crystal structure of bis(μ-2-benzoylbenzoato-κ<sup>2</sup><i>O</i>:<i>O</i>′)bis[bis(2,2′-bipyridine-κ<sup>2</sup><i>N</i>,<i>N</i>′)manganese(II)] bis(perchlorate)
Acta crystallographica. Section E, Crystallographic communications