Synthesis and study of novel Ln(III)-containing isostructural heteropoly tungstates Na<sub>9</sub>[Ln(W<sub>5</sub>O<sub>18</sub>)<sub>2</sub>]·34.25H<sub>2</sub>O (Ln = La, Pr)
Abstract
The conditions necessary for the synthesis of crystalline isostructural sodium heteropoly decatungstolanthanidates(III) Na9[Ln(W5O18)2]·34.25H2O (Ln = La (1), and Pr (2)) with needle-like micromorphology were elaborated. X-ray single crystal analysis for 1 and 2 was performed (figure 1), revealing fundamental data for the crystal structures of novel heteropoly tungstates with Peacock–Weakley type of anion. The study demonstrated that the polyhedron of the Ln(III) heteroatom is a square antiprism formed by two tetradentate lacunary isopoly pentatungstate anions [W5O18] 6– .
