Diaquabis(1,10-phenanthroline-κ2N,N′)manganese(II) sulfate hexahydrate

In the title compound, [Mn(C12H8N2)(2)(H2O)(2)]SO4 center dot 6H(2)O, the complex cations assemble into positively charged sheets parallel to (010) via intermolecular pi-pi stacking interactions with a mean interplanar distance of 3.410 (6) along [100] and 3.465 (5) angstrom along [001]. The sulfate anions and uncoordinated water molecules are interconnected between these layers by hydrogen bonds, forming negatively charged layers which are linked to the positive layers through O-H center dot center dot center dot O hydrogen bonds, forming a three-dimensional architecture. Both the positive and negative sheets are stacked along [010] in an center dot center dot center dot ABAB center dot center dot center dot sequence, the A layers being shifted by 1/2a along [100] with respect to the B layers. One of the uncoordinated water molecules is equally disordered over two positions.