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- W2317207430 abstract "Yttrium and the smaller group 3 and 4f metal homoleptic M(III) cyclopentadienyls [MCp″3] (Cp″ = [η5-C5H3(SiMe3)2-1,3]− and M = Y (1Y), Er (1Er), or Yb (1Yb)) were prepared from YCp″2I (2Y) or the appropriate [LnCp″2I(thf)] and KCp″ in satisfactory (1Y), very low (1Er), or low (1Yb) yield. Attempted reaction of [ScCp″2I(thf)] with KCp″ failed to produce the homoleptic Sc(III) cyclopentadienyl. Compound 1Yb was synthesized in better yield by the redox reaction between [YbCp″2(thf)] and either [PbCp″2] (3) or the in situ prepared HgCp″2 (4) analogue. Complexes 3 and 4 were obtained by a salt metathesis route, 3 was isolated as a crystalline solid, while 4 was used only as a hexane solution. The structures of crystalline 1Y, 1Yb, 3, [{YCp″2(μ-OH)}2] (5Y) [prepared by hydrolysis of 1Y], [(ScCp″2)2(μ-η2:η2-C2H4)] (6) {isolated in low yield from the reaction of ScCp″2I (2Sc) with [K(18-crown-6)]2[C6H2(SiMe3)4-1,2,4,5]}, [LaCp″2Cl(μ-Cl)K(18-crown-6)] (7La) {obtained from the foregoing potassium reagent and [{LaCp″2(μ-Cl)}2]}, [YbCp″2Cl(μ-Cl)K(18-crown-6)] (7Yb), and [{KCp″}∞] (8) were determined by X-ray diffraction." @default.
- W2317207430 created "2016-06-24" @default.
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- W2317207430 date "2011-12-21" @default.
- W2317207430 modified "2023-10-14" @default.
- W2317207430 title "Syntheses and Structures of the Crystalline, Highly Crowded 1,3-Bis(trimethylsilyl)cyclopentadienyls [MCp″<sub>3</sub>] (M = Y, Er, Yb), [PbCp″<sub>2</sub>], [{YCp″<sub>2</sub>(μ-OH)}<sub>2</sub>], [(ScCp″<sub>2</sub>)<sub>2</sub>(μ-η<sup>2</sup>:η<sup>2</sup>-C<sub>2</sub>H<sub>4</sub>)], [YbCp″<sub>2</sub>Cl(μ-Cl)K(18-crown-6)], and [{KCp″}<sub>∞</sub>]" @default.
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- W2317207430 doi "https://doi.org/10.1021/om2009364" @default.
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