Synthesis and crystal and molecular structure of three heterometallic polymeric compounds {Ln 2[LnGe6(μ-Oedph)6(μ-O)3(μ-OH)3(H2O)4] · xH2O} n [Ln = Nd, x ∼ 26 (I); Er, x ∼ 24 (II); Tm, x ∼ 20 (III); H4 Oedph = 1-hydroxyethylidenediphosphonic acid

Abstract

The synthesis and X-ray diffraction study of three heterometallic compounds of general formula {Ln2[LnGe6(μ-Oedph)6(μ-O)3(μ-OH)3(H2O)4] · xH2O}n [Ln = Nd, x ∼ 26 (I); Er, x ∼ 24 (II); Tm, x ∼20 (III); H4Oedph = 1-hydroxyethylidenediphosphonic acid] are performed. The basis element of structures I–III is a hexanuclear complex anion [Ge(μ-Oedph)(μ-O)0.5(μ-OH)0.5]69−, in which bridging hydroxo and oxo ligands are statistically disordered with equally probability. Hexameric units are connected by Ln1(H2O)4 fragments into a framework whose channels are completely populated by disordered lanthanide atoms and water molecules.