In recent years, our research group have studied and worked on several bi- or trivalent metal complexes with several proton transfer ion pairs containing pyridine-2,6-dicarboxylic acid, pydcH2. In resulting complexes, some fragments of ion pairs coordinate to metal ions and some other fragments act as counter ions in the structure. Here we wish to report the molecular structure of the Sn(VI) complex, which obtained from a novel proton transfer compound (bdaH2)(pydcH)2 • 2H2O. The proton transfer compound (bdaH2)(pydcH) 2 • 2H2O, has been prepared from the reaction between benzene-1,3-diamine, bda, and pyridine-2,6-dicarboxylic acid, pydcH2. The reaction of this adduct with Sn(CH3)2Cl2 gives complex with stoichiometry [Sn(pydc)(OC2H5)(CH 3)2(μ-O)]2. This complex was characterized by IR, NMR spectroscopy and X-ray crystallography. This complex crystallizes in the monoclinic system, space group P21/c, with four molecules per unit cell. The unit cell dimensions are a=11.5924(14)Å, b=13.2674(17)Å, c=7.7566(10)Å C484
