Two complexes (H 2 bipy) M 2 (TB) 2 (H 2 O) 8· 5H 2 O (M= Mn 1, Zn 2)(bipy= 4, 4′- bipyridine, H 3 TB= 1, 3, 5-tris (carboxymethoxyl) benzene) were synthesized by the reaction of the corresponding metal salt with ligand H 3 TB and 4, 4′-bipy in an aqueous methanol solution at room temperature, respectively. Their structures were determined by single crystal X-ray diffraction analysis. Both complexes 1 and 2 crystallize in the triclinic space ...