ChemInform Abstract: Lanthanide Complexes of Macrocyclic Polyoxovanadates by VO₄ Units: Synthesis, Characterization, and Structure Elucidation by X‐Ray Crystallography and EXAFS Spectroscopy.

Abstract

The title compounds are characterized by single crystal XRD, IR, and EXAFS. The lanthanide polyoxovanadates are extremely hygroscopic. (IIIa)·MeCN, (IIIb)·MeCN, and (IIIe)·MeCN crystallize in the orthorhombic space group P2 1 2 1 2 1 with Z = 8. (IIIf)·4MeCN crystallizes in the monoclinic space group P21/c with Z = 12 and (V)·4MeCN in the monoclinic space group P21/n with Z = 4. (VIIa-d)·2MeCN crystallize in the monoclinic space group P21/n with Z = 2. The compounds (IIIa-f) exhibit a structure with a nine-membered vanadium ring and a square-antiprismatic coordination sphere. (VIIa-d) adopt an octahedral coordination mode with a ten-membered vanadium ring, and the structure of (V) contains a trigonal-prismatic coordination environment by two sandwiching, cyclic tetravanadates with a capping H 2 O ligand. -(NISHIO, M.; INAMI, S.; KATAYAMA, M.; OZUTSUMI, K.; HAYASHI*, Y.; Inorg. Chem. 51 (2012) 2, 784-793, http://dx.