X-Ray diffraction and IR-spectroscopic studies of UO2(n-C3H7COO)2(H2O)2 and Mg(H2O)6[UO2(n-C3H7COO)3]2

Single crystals of UO2(n-C3H7COO)(2)(H2O)(2) (I) and Mg(H2O)(6)[UO2(n-C3H7COO)(3)](2) (II) are synthesized. Their IR-spectroscopic and X-ray diffraction studies are performed. Crystals I are monoclinic, a = 9.8124(7) , b = 19.2394(14) , c = 12.9251(11) , beta = 122.423(1)A degrees, space group P2(1)/c, Z = 6, and R = 0.0268. Crystals II are cubic, a = 15.6935(6) , space group , Z = 4, and R = 0.0173. The main structural units of I and II are [UO2(C3H7COO)(2)(H2O)(2)] molecules and [UO2(C3H7COO)(3)](-) anionic complexes, respectively, which belong to AB (2) (01) M (2) (1) (I) and AB (3) (01) (II) crystal chemical groups of uranyl complexes (A = UO (2) (2+) , B (01) = C3H7COO-, and M (1) = H2O). A crystal chemical analysis of UO2 L (2) center dot nH(2)O compounds, where L is a carboxylate ion, is performed.