Search

A study reports that fluorinated phenoxide could be used to form stable, soluble compounds of Eu(II) and Eu(III) as well as a heterovalent dimer. Dative Ln-F interactions were noted with Eu(II) ions while Eu(III) ions were observed to adopt terminal phenoxide ligations and since phenoxides are soluble in apolar media, they are potentially useful as capping reagents in lanthanide cluster chemistry.

Research has been conducted on hybrid borophosphate-phenylphosphonate polyoxometalate polyanion. The authors report the hydrothermal synthesis of this compound starting from imidazole, molybdenum oxide and phosphoric, boric and phenylphosphonic acids.

Lanthanide chalcogenolates react with either TeO2in pyridine or py-SO3in THF to give oxychalcogenido clusters. The sulfido derivatives (THF)8Ln8S2O2(SePh)16(Ln = Ce, Nd) are isostructural with previously reported oxoselenido compounds, and must be prepared at low temperatures to avoid the introduction of Se into the sulfide position. Analogous telluride derivatives for the early lanthanides were not obtained, but reactions of in situprepared Ln(TePh)3with elemental Te and TeO2gave a complicated heterocluster product, with tetrametallic polytelluride [(py)7Ln4(μ4-Te)(μ2-Te2)2(μ-η2-η2-Te2Te(Ph)Te2)(TePh)] co-crystallizing with the oxotellurido compound [(py)5Ln3(μ3-O)(μ2-Te2)3(TePh)] (Ln = Ho, Er). An analysis of the thermal decomposition of these compounds did not identify the oxo-containing products, with the sulfide compounds decomposing to give only Ln3Se4and the telluride compounds forming crystalline LnTe and Te metal. [ABSTRACT FROM AUTHOR]

The fluorinated phenoxide OC6F5 forms the stable Eu(II) and Eu(III) derivatives (DME)2Eu(μ-OC6F5)3Eu(μ-OC6F5)3-Eu(DME)2 and (DME)2Eu(OC6F5)3, as well as the heterovalent product (DME)2Eu(μ-OC6F5)3Eu(DME)(OC6F5)2, in redox reactions of Eu with HOC6F5 or in proton-transfer reactions of HOC6F5 with Eu(SPh)2. The divalent complex crystallizes as a trimer with three bridging phenoxides bridging each pair of metals, with the terminal metals coordinating DME and the central metal ion encapsulated totally by O(C6F5) and dative fluoride interactions. The trivalent compound is monomeric with terminal phenoxide ligands and no Eu-F interactions. The heterovalent compound has clearly localized metal valence states and coordination features that mimic the homovalent species with the terminal OC6F5 bound to the Eu(III) ion, three bridging OR ligands spanning the Eu(II) and Eu(III) ions, and dative Eu(II)-F bonds. At elevated temperatures, these compounds decompose to give a mixture of solid-state fluoride phases. [ABSTRACT FROM AUTHOR]

Studies a phenyl-substituted molybdenum boro-phosphate polyoxometalate. Key issues of interest; Analysis of pertinent topics and relevant issues; Implications on studies of inorganic chemistry.