Coordination Polymers of Scandium Sulfate.Crystal Structures of (H_2Bipy)[Sc(H_2O)(SO_4)_2]_2 centre dot 2H_2O and (H_2Bipy)[HSO_4]_2

摘要

Compounds with the general formula Cat_x[Sc(H_2O)_z(SO_4)_y] centre dot nH_2O (Cat=NH_4,H_2Bipy (Bipy is 4,4'-bipyridine),and HEdp (Edp is ethylenedipyridine) are synthesized and identified by elemental analysis and IR spectral data.The X-ray diffraction analysis of (H_2Bipy)[Sc(H_2O)(SO_4)_2]_2 centre dot 2H_2O shows that in the structure of this compound,the chains of ScO_6 octahedra and SO_4 tetrahedra are united to form ribbons due to the tri-dentate coordination of the sulfate ion.The ribbons form a framework,whose infinite cavities contain H_2Bipy~(2+) cations.