Uber dicyclopentadienyleuropium und dicyclopentadienylytterbium und tricyclopentadienyle des terbiums, holmiums, thuliums und lutetiums

Oxidation of europium with ammonium perfluorocarboxylates in liquid ammonia: pathways to europium(ii) carboxylates and hexanuclear europium(iii) fluoridocarboxylate complexes

“…The stabilizing effect of liquid ammonia as a reaction medium on Eu 2+ ions has been known for decades 22 and has been used, for example, in the synthesis of Eu(C 5 H 5 ) 2 , 23 Eu(PH 2 ) 2 , 24 Eu(NH 2 ) 2 , 25 and of unsolvated europium( ii ) halides. 26…”

Lanthanidocenes: Synthesis, Structure, and Bonding of Linear Sandwich Complexes of Lanthanides

“…For the other lanthanides, three Cp ligands surround the metal center with +III oxidation states, leading to Cp 3 Ln, , while with +II oxidation states, a bending is induced because of inter­molecular interactions. , Furthermore, in Cot chemistry, the anionic nature of the trivalent metal complexes also generally results in bending and/or in the formation of chain structures, preventing the establishment of a systematic isostructural series of linear sandwich complexes of lanthanides. − …”

Synthesis of Arenethiolate Complexes of Divalent and Trivalent Lanthanides from Metallic Lanthanides and Diaryl Disulfides: Crystal Structures of [{Yb(hmpa)3}2(μ-SPh)3][SPh] and Ln(SPh)3(hmpa)3(Ln = Sm, Yb; hmpa = Hexamethylphosphoric Triamide)

“…To avoid this difficulty, the reaction of alkyl or amido lanthanide complexes with thiols − and the oxidative reaction of low-valent organosamarium or ytterbium complexes with organic disulfides − have been applied. Lanthanide compounds such as halide, − alkoxide, − amide, and organolanthanide compounds − have been directly prepared from metallic lanthanides and this is the most effective synthetic strategy. Here we describe the details of the selective formation of divalent and trivalent samarium, europium, and ytterbium arenethiolate complexes by the direct reaction of lanthanide metals with diaryl disulfides, some details of which have been communicated …”