Catena-Poly[[(4-methylbenzoato-κO)-manganese(II)]-μ-aqua-bis(μ- 4-methylbenzoato-κ²O:O′)[(4-methylbenzoatoκO) manganese(II)]-bis(μ-N,N-diethylnicotinamide)-κ²N ³:O;O:N³]

The asymmetric unit of the title complex, [Mn₂(C ₈H₇O₂)₄(C₁₀H ₁₄N₂O)₂(H₂O)]_n , contains two crystallographically independent units. In each one, the Mn^II ions are bridged by two 4-methyl-benzoate (PMB) ligands and one water molecule. In the crystal structure, each Mn^II ion is coordinated by three PMB ligands, one water molecule and two symmetry-related N,N-diethyl-nicotinamide (DENA) ligands. Symmetry-related Mn^II ions are bridged by the N and O atoms of symmetry-related DENA ligands, forming polymeric chains parallel to [100]. The coord-ination environmnts for the Mn^II ions are slightly distorted octa-hedral. Intra-molecular O-H⋯O hydrogen bonds link bridging water molecules to the carboxylate O atoms of a neigh-boring polymeric chain. In the crystal structure, π-π contacts between benzene rings [centroid-centroid distance = 3.562 (1) Å] and weak C-H⋯π inter-actions are also observed.