cis-(Acetonitrile-κN)aquabis(2,2'-bipyrimidine-κ2 N 1,N 1')manganese(II) cis-diaquabis(2,2'-bipyrimidine-κ2 N 1,N 1')manganese(II) tetrakis(perchlorate) dihydrate

The asymmetric unit of the title compound, [Mn(CH3CN)(C8H6N4)(2)(H2O)][Mn(C8H6N4)(2)(H2O)(2)](ClO4)(4)center dot 2H(2)O, contains two distinct cationic MnII complexes, four perchlorate anions and two solvent water molecules. In the two complexes, both MnII ions are six-coordinated in a distorted octahedral environment, but one Mn ion has a cis-N5O coordination geometry defined by four N atoms of the two chelating 2,2'-bipyrimidine (bpym) ligands, one N atom of a coordinating acetonitrile molecule and one O atom of a water ligand, whereas the other Mn ion has a cis-N4O2 coordination geometry defined by four N atoms of the two bpym ligands and two O atoms of water ligands. In the crystal structure, the complex molecules, anions and solvent water molecules are linked by intermolecular O-H...O and O-H...N hydrogen bonds. Three of the four perchlorate anions are disordered over two sets of sites in different ratios.