Synthesis and Crystal Structre of Bipyridyl Comlexes of Praseodymium Nitrate and Chloride

Crystal structures of Pr (NO3)3 (H2O)4. (C10H8N2)2H2O and Pr Cl3 (H2O)4. (C10H10N2)1.5 Cl3 were solved using x-ray diffraction technique. The nitrate complex was orthorhombic with space group P212121, whereas the chloride complex showed a monoclinic system with space group p21/c. The Pr in the nitrate complex is 10-coordinate from three bidentate groups and four water molecules. The two independent bipyridyl molecules are lying on general positions and neither protonated nor coordinated to the central atom Pr. In the chloride complex, the Pr is 7-coordinate from three chlorides and four water molecules. The two bipyridyl molecules are uncoordinated to the central atom.