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• W2019963268 abstract "Reaction of KPHAr (Ar = C6H2tBu3-2,4,6) with 1 equiv of Me2SiCl(C5Me4H) in THF afforded Me2Si(C5Me4H)(PHAr) (1) in 92% isolated yield. Metalation of 1 with 2 equiv of BuLi in THF followed by metathesis reaction with tBuOK gave the corresponding potassium complex [Me2Si(C5Me4)(PAr)K2(thf)4]2 (2) in 88% isolated yield. Reactions of 2 with 2 equiv of LnI2(thf)2 in THF afforded the corresponding lanthanide(II) complexes Me2Si(C5Me4)(PAr)Ln(thf)3 (Ln = Sm (3, 66%), Yb (4, 81%)). Two of the three thf ligands in 3 could be removed under vacuum to give [Me2Si(C5Me4)(PAr)Sm(thf)] (3‘). Treatment of 3 with hexamethylphosphoric triamide (hmpa) or dimethoxyethane (dme) yielded the corresponding hmpa- or dme-coordinated complex Me2Si(C5Me4)(PAr)Sm(hmpa)2 (5) or Me2Si(C5Me4)(PAr)Sm(dme)2 (6), respectively. The reaction of 2 equiv of 3 or 3‘ with benzophenone in THF afforded the corresponding disamarium(III) benzophenone-dianion complex [Me2Si(C5Me4)(PAr)Sm(thf)]2(μ-η2-OCPh2) (7). Treatment of 3 or 3‘ with ICH2CH2I in toluene easily afforded the corresponding samarium(III) iodide complex [Me2Si(C5Me4)(PAr)Sm(μ-I)(thf)]2 (8). The solid structures of all of these compounds, 1−8, have been determined by X-ray analyses. The mono(thf)-coordinated Sm(II) complex 3‘ was active for the polymerization of ethylene, ε-caprolactone, and 1,3-butadiene under appropriate conditions." @default.
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• W2019963268 date "2001-10-01" @default.
• W2019963268 modified "2023-09-27" @default.
• W2019963268 title "Synthesis, Structures, and Reactivity of the First Silylene-Linked Cyclopentadienyl-Phosphido Lanthanide Complexes" @default.
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• W2019963268 doi "https://doi.org/10.1021/om010469i" @default.
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