摘要
The intensity data of the title complex were collected at a low temperature of -90℃. Thecompound crystallizes in the monoclinic space group P2<sub>1</sub>/n, a = 17.504（2）, b = 27.323 （5）,c = 21 .616（4）A, β= 104.49 （2）°, Z=4. The structure was solved by Patterson and Fouriertechniques and refined by least- squares to an R = 0.088 for 8320 independent reflections.The central Pr ion is bonded to eight oxygen atoms from two molybdosilicic heteropolyligands to form a square antiprism. The Pr- O average distance is 2.44 （2）A. Both molyb-dosilicic heteropoly ligands are of a defective α- Keggin structure.
The intensity data of the title complex were collected at a low temperature of -90℃. The
compound crystallizes in the monoclinic space group P2_1/n, a = 17.504(2), b = 27.323 (5),
c = 21 .616(4)A, β= 104.49 (2)°, Z=4. The structure was solved by Patterson and Fourier
techniques and refined by least- squares to an R = 0.088 for 8320 independent reflections.
The central Pr ion is bonded to eight oxygen atoms from two molybdosilicic heteropoly
ligands to form a square antiprism. The Pr- O average distance is 2.44 (2)A. Both molyb-
dosilicic heteropoly ligands are of a defective α- Keggin structure.
