Crystal structure and thermal properties of bis-[μ-2-(meth-oxy-carbonyl-hydrazinyl-idene)acetato-κ 3 N 1 , O : O ]bis-[di-aqua-(thio-cyanato-κ N )manganese(II)] tetra-hydrate.

The title compound, [Mn2 (C4 H5 N2 O4 )2 (NCS)2 (H2 O)4 ]·4H2 O (I), exists as a centrosymmetric dimer. Each dimeric unit consists of tridentate ( O , O , N )-chelating Schiff bases with symmetry-maintained μ- O -bridged carboxyl-ate anions, terminally bound thio-cyanate anions, and ligated and solvated water mol-ecules. The complex exhibits a distorted octa-hedron geometry and the centrosymmetric μ- O -bridged carboxyl-ate anions connect the two manganese atoms to form an M 2 O2 ring. In the crystal, the mol-ecules are inter-linked via strong N-H⋯O and O-H⋯O hydrogen-bonding contacts and weak O-H⋯S inter-molecular inter-actions, forming a three-dimensional mol-ecular network.