A New Succinato‐bridged Supramolecular Helix Chain: Crystal Structure of [Mn(H2O)2(bpy)(C4H4O4)] · H2O with bpy = 2,2′‐bipyridine

Yellow crystals of Mn(H₂O)₂(bpy)(C₄H₄O₄)] · H₂O were obtained by the reaction of 2,2′‐bipyridine, succinic acid, MnSO₄ · H₂O and Na₂CO₃ in an aqueous methanol solution. The crystal structure (monoclinic, P2₁/c (no. 14), a = 8.294(1), b = 11.556(1), c = 17.064(1)Å, β = 95.181(6)°, Z = 4, R = 0.0349, wR² = 0.0887) consists of 1D supramolecular helix chains Mn(H₂O)₂(bpy)(C₄H₄O₄)_2/2] and hydrogen bonded H₂O molecules. The Mn atoms are octahedrally coordinated by two N atoms of one bidentate chelating bpy ligand and four O atoms of two H₂O molecules and two bis‐monodentate bridging succinato ligands with d(Mn–O) = 2.139–2.237Å and d(Mn–N) = 2.268, 2.281 Å. The helix chains are held together by π‐π stacking interactions and hydrogen bonds.