title: New type of heterometallic 3d-4f rhomblike core in Weakley-like polyoxometalates.
abstract: The first heterometallic copper-cerium polyoxometalate, [{Ce(IV)(OAc)}Cu(II)(3)(H(2)O)(B-α-GeW(9)O(34))(2)](11-) (1), is composed of an unprecedented copper(II)-trisubstituted Weakley-type tungstogermanate subunit stabilized by coordination of a {Ce(OAc)}(3+) group at the vacant position. The title species contains a central {Ce(IV)Cu(II)(3)O(18)} rhomblike cluster that belongs to a new {(4f(ext))(3d(ext))(3d(int))(2)} type and magnetically behaves as a triangular Cu(3) system with overall antiferromagnetic exchange affected by the structural distortions the vicinity of diamagnetic Ce(IV) induces.
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain. santiago.reinoso@ehu.es
authors.forename: Santiago
authors.initials: S
authors.lastname: Reinoso
authors.forename: José Ramón
authors.initials: JR
authors.lastname: Galán-Mascarós
authors.forename: Luis
authors.initials: L
authors.lastname: Lezama
mesh_terms: D002563:Cerium / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004578:Electron Spin Resonance Spectroscopy; D008280:Magnetics; D008958:Models, Molecular; D017550:Spectroscopy, Fourier Transform Infrared; D017973:Tungsten Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D002563:Cerium; D056831:Coordination Complexes; D003300:Copper; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates