Synthesis and crystal and molecular structure of three heterometallic polymeric compounds {Ln (2)[LnGe(6)(mu-Oedph)(6)(mu-O)(3)(mu-OH)(3)(H2O)(4)] center dot xH(2)O}(n) [Ln = Nd, x similar to 26 (I); Er, x similar to 24 (II); Tm, x similar to 20 (III); H-4 Oedph=1-hydroxyethylidenediphosphonic acid]

摘要

The synthesis and X-ray diffraction study of three heterometallic compounds of general formula {Ln (2)[LnGe(6)(mu-Oedph)(6)(mu-O)(3)(mu-OH)(3)(H2O)(4)] center dot xH(2)O}(n) [Ln = Nd, x similar to 26 (I); Er, x similar to 24 (II); Tm, x similar to 20 (III); H-4 Oedph = 1-hydroxyethylidenediphosphonic acid] are performed. The basis element of structures I-III is a hexanuclear complex anion [Ge(mu-Oedph)(mu-O)(0.5)(mu-OH)(0.5)](6)(9-) , 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.