Poly[[[aquamanganese(II)]-mu2-4,4'-bipyridine-mu3-succinato] 4,4'-bipyridine hemisolvate].

The polymeric title complex, [[Mn(C(4)H(4)O(4))(C(10)H(8)N(2))(H(2)O)].0.5C(10)H(8)N(2)](n), possesses a three-dimensional open-framework structure, with the solvate 4,4'-bipyridine (bipy) molecules, which lie around centers of inversion, clathrated in the channels of the framework. The Mn(II) center is surrounded by three succinate (succ) ligands, one water molecule and two bipy ligands, and displays a slightly distorted octahedral coordination environment, with cis angles ranging from 84.14 (12) to 96.56 (11) degrees. Each succ dianion coordinates to three Mn(II) atoms, thus acting as a bridging tridentate ligand; in turn, the Mn(II) atoms are bridged by three succ ligands, thus forming a two-dimensional Mn-succ sheet pillared by the bridging bipy ligands. Two hydrogen-bonding interactions, involving the water molecules and the carboxy O atoms of the succ ligands, are present in the crystal structure.