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The title complex, [Mn(2)(SO(4))(2)(C(8)H(6)N(4))(H(2)O)(6)], is the second monoclinic polymorph [De Munno et al. (1995 ▶). Inorg. Chem.34, 408-411; Hong et al. (1996 ▶). Polyhedron, 15, 447-452]. The asymmetric unit contains two crystallographically independent half-mol-ecules of the binuclear Mn(II) complex; an inversion centre is located at the centroid of each complex. The two Mn(II) atoms in each complex mol-ecules are bridged by a bis-chelating 2,2'-bipyrimidine (bpym) ligand and each Mn(II) atom is six-coordinated in a considerably distorted octa-hedral environment defined by two N atoms of the bridging bpym ligand and four O atoms from one sulfato anionic ligand and three water mol-ecules. In the crystal, the complex mol-ecules are linked by O-H⋯O hydrogen bonds between the water and sulfato ligands, forming a three-dimensional network.

acta crystallographica. section e

(μ-2,2′-Bipyrimidine-κ4N1,N1′:N3,N3′)bis[triaqua(sulfato-κO)manganese(II)]