title: Synthesis, structure, and physical properties of new rare earth ferrocenoylacetonates.
abstract: New ferrocenoylacetonate complexes of several rare earth elements, [Ln(fca)3(bpy)]·MeC6H5 (Ln = Pr (), Eu (), Gd (), Tb (), Dy (), Ho (), Y (); bpy - 2,2'-bipyridine; Hfca - FcCOCH2COMe) as well as scandium ferrocenoylacetonate [Sc(fca)3]·0.5MeC6H5 (), were synthesized and characterized by single crystal X-ray diffraction analysis. In the crystal lattice of the isostructural complexes , two [Ln(fca)3(bpy)] molecules form a pair due to stacking interactions between the bpy ligands. The Ln(3+) ions are coordinated in a square antiprism geometry with a coordination number of 8. The Sc(3+) ions in complex are coordinated in an octahedral geometry. Thermolysis of complexes was studied under air and argon atmospheres; in the first case, it affords perovskites LnFeO3 as one of the products. Complexes display single-molecule magnet properties, and the effective relaxation barrier for the Dy complex , was found to be Δeff/kB = 241 K, which is one of the highest values obtained for a mononuclear β-diketonate lanthanide complex.
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Pavel S
authors.initials: PS
authors.lastname: Koroteev
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Zhanna V
authors.initials: ZV
authors.lastname: Dobrokhotova
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Andrey B
authors.initials: AB
authors.lastname: Ilyukhin
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Nikolay N
authors.initials: NN
authors.lastname: Efimov
authors.affiliation: CNRS, CRPP, UPR 8641, F-33600 Pessac, France. clerac@crpp-bordeaux.cnrs.fr and Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Rouzières
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Mikhail A
authors.initials: MA
authors.lastname: Kiskin
authors.affiliation: CNRS, CRPP, UPR 8641, F-33600 Pessac, France. clerac@crpp-bordeaux.cnrs.fr and Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France.
authors.forename: Rodolphe
authors.initials: R
authors.lastname: Clérac
authors.affiliation: N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, GSP-1, 119991 Moscow, Russian Federation. pskoroteev@list.ru.
authors.forename: Vladimir M
authors.initials: VM
authors.lastname: Novotortsev