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The cation of the salt, [Mn 2 (C 14 H 14 N 4 ) 3 (H 2 O) 2 ](ClO 4 ) 4 , lies on a center of inversion, the center lying midway along the ethyl­ene chain of the bridging  N , N ′-bis­(2-pyridylmethyl­ene)ethane-1,2-diamine ligand. The Mn atom is chelated by two atoms N atoms of this bridging ligand, and is also coordinated by four N atoms of another ligand. The Mn atom is seven-coordinated in a penta­gonal-bipyramidal environment. The crystal structure displays inter­molecular π–π inter­actions between adjacent pyridine rings, with a shortest centroid–centroid distance of 3.784 (3) Å. The perchlorate is linked to the dinuclear cation by O—H⋯O hydrogen bonds.

acta crystallographica. section e

[μ-N,N′-Bis(2-pyridylmethylene)ethane-1,2-diamine]bis{aqua[N,N′-bis(2-pyridylmethylene)ethane-1,2-diamine]manganese(II)} tetrakis(perchlorate)