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In the title centrosymmetric tetra­nuclear complex, [Mn 4 (C 12 H 6 O 4 ) 4 (C 10 H 8 N 2 ) 4 (H 2 O) 8 ]·4H 2 O, two independent Mn II  ions are coordinated in a slightly disorted octa­hedral environment by two aqua ligands, two naphthalene-1,8-dicarboxyl­ate (1,8-nap) ligands and one bis-chelating 2,2′-bipyridine (2,2′-bipy) ligand. In the crystal, mol­ecules are linked by inter­molecular O—H⋯O hydrogen bonds into chains along [100]. These chains are further linked by weak π–π inter­actions with centroid–centroid distances in the range of 3.609 (2)–3.758 (1) Å, forming a three-dimensional supra­molecular network.

cyclo-Tetrakis(μ-naphthalene-1,8-dicarboxylato)tetrakis[diaqua(2,2′-bipyridine)manganese(II)] tetrahydrate