The synthesis and crystal structure of heteronuclear complex of lanthanide with sulfo-salicylic acid [Na_3YLa_2(C_7H_3SO_6)_4·26H_2O]_n

摘要

The titled complex has been synthesized by the reaction of sodium sulfo-salicylate with lanthanum and yttrium perchlorate. The crystal structure has been determined by single crystal X-ray diffractometry. The crystal is monoclinic with space group C2/c. The unit cell parameters are as follows: a=16.289(8), b=18.323(8), c=22.044(8) A, β=106.34(2)°, V=6314(6) A~3, Z=4 and Dc=1.764 g/cm~3. The structure was solved by direct method. The least-square refinement based on 3776 observed reflections [F > 6σ(F)] converged to a final R=8.6% and F(000) is 3548. Yttrium ion with eight-coordinate is located in central of the molecule, the two lanthanum ions with ten-coordinate are located at the two sides of yttrium ion. There are two positions for Na in the molecule, one is in the C_2 axis with six coordinate, the other one is in a general position with five-coordinate.