XRD structure of two heptacoordinated Mn(II) complexes containing 2,9-dimethyl-1,10-phenanthroline (phen), nitrato and nicotinato bidentate anions: [Mn(phen)(nicot)(NO3)(H2O)]·EtOH·H2O and [Mn(phen)(NO3)2(H2O)]

The structure of two seven-coordinated Mn(II) complexes with the formula [Mn(phen)(nicot)(NO3)(H2O)] and [Mn(phen)(NO3)2(H2O)] (phen = 2,9-dimethyl-1,10-phenanthroline) are reported. Both coordination polyhedra are intermediate between pentagonal bipyramidal (apical sites occupied by a nitrogen from phen and the water molecule) and square-capped trigonal prismatic, the capping site being occupied by the water molecule.