Synthesis and crystal structure of two manganese-based 12-metallacrown-4 complexes: Na<sub>2</sub>(3-chlorobenzoate)<sub>2</sub>[12-MC<sub>Mn(III)N(shi)</sub>-4](DMF)<sub>6</sub> and MnNa(3-chlorobenzoate)<sub>3</sub>[12-MC<sub>Mn(III)N(shi)</sub>-4](DMF)(H<sub>2</sub>O)<sub>4</sub>·4DMF·0.72H<sub>2</sub>O
Acta crystallographica. Section E, Crystallographic communications