Heterometallic complex of Europium(III) trifluoroacetate with bis(diphenylphosphoryl)ferrocene (DppfO<SUB>2</SUB>): synthesis, structure and thermal stability

A new bimetallic complex [Eu2(OOCCF3)6(H2O)2(dppfO2)2] (I) was obtained by the reaction of aqueous europium(III) trifluoroacetate with bis(diphenylphosphoryl)ferrocene (DppfO2) in a solvent mixture of tetrahydrofuran-benzene (1 : 1), and characterized by X-ray diffraction (CCDC No. 2425374), IR spectroscopy, and elemental analysis. According to the X-ray analysis data, compound I is a molecular complex in which two europium atoms are connected by bridging water molecules and trifluoroacetate anions, and terminal DppfO2 molecules are coordinated chelately. According to the STA data, the complex is thermally stable up to 200°C, its decomposition is accompanied by an exothermic effect at 285°C associated with the desorption of four trifluoroacetic acid molecules.