Structures of mixed-ligand Manganese(II) compounds [Mn(Heida)(Phen)]2 · 7H2O and [Mn2(Edta)(Phen)] · 4H2O

The crystal structures of [Mn(Heida)(Phen)]2 · 7H2O (I) and [Mn2(Edta)(Phen)] · 4H2O (II) are studied by X-ray diffraction [R1 = 0.0375 (0.0283) and wR2 = 0.0954 (0.0662) for 5449 (3176) observed reflections in I (II), respectively]. Structure I contains mononuclear mixed-ligand complexes [Mn(Heida)(Phen)] and [Mn(Heida)(Phen)(H2O)]. In structure II, the [Mn(Edta)]2− anionic complexes and the [Mn(Phen)(H2O)2]2+ cationic complexes are linked by the bridging carboxyl groups into the tetramers with C2 symmetry. In both compounds, two independent Mn atoms have different coordination numbers (6 and 7).