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- W1993988698 abstract "The tetrachloride salt of uranium reacts with 1 equiv of the lithium ligand Li2[(C5Me4)2SiMe2] in DME to form the complex [η5-(C5Me4)2SiMe2]UCl2·2LiCl·2DME (1), which undergoes a rapid hydrolysis either in DME with equimolar amounts of water to give the coordinatively unsaturated bridged monooxide and monochloride uranium lithium salt complex { [η5-(C5Me4)2SiMe2]UCl}2(μ-O)(μ-Cl)·Li(DME)3·DME (2) or in toluene to yield the dimeric bridged monochloride monooxide lithium salt complex [{[η5-(C5Me4)2SiMe2]UCl}2(μ-O)(μ-Cl)·Li·1/2DME]2 (3). Alkylation of either complex 2 or 3 with BuLi in DME gives the monobridged dibutyl complex {[η5-(C5Me4)2SiMe2]UBu}2(μ-O) (4). Complex 2 was characterized by solid state X-ray analysis. Complex 4 was found to be an active catalyst for the disproportionation metathesis of TMSC≡CH and the cross-metathesis of TMSC≡CH or TMSC≡CTMS with various terminal alkynes. To shed some light on the possible mechanistic scenario, different alkynes, TMSC≡CH, TMSC≡CTMS, or TMSC≡CPri, were reacte..." @default.
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- W1993988698 date "2008-08-14" @default.
- W1993988698 modified "2023-09-23" @default.
- W1993988698 title "Coordinative Unsaturation versus Oxophilicity: <i>ansa</i> Dimethylsilyl Oxo-Bridged Uranium Metallocenes. Synthesis, Structures, and Unexpected Catalytic Activity with Alkynes and Silanes" @default.
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- W1993988698 doi "https://doi.org/10.1021/om800418u" @default.
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