[[η5-(C5Me4)2SiMe2]U(n-butyl)]2(μ-O) | 905619-97-8

• 英文名称: [[η5-(C5Me4)2SiMe2]U(n-butyl)]2(μ-O)
• 英文别名: [[η5-(C5Me4)2SiMe2]U(n-Bu)]2(μ-O)
• CAS: 905619-97-8
• 化学式: C₄₈H₇₈OSi₂U₂
• 分子量: 1203.38
• InChiKey: QSLOXMAAXNCKGU-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  正丁基锂 、 [([η5-(C5Me4)2SiMe2]UCl)2(μ-O)(μ-Cl)Li(dimethoxyetane)0.5)]2 以 not given 为溶剂， 生成 [[η5-(C5Me4)2SiMe2]U(n-butyl)]2(μ-O)
  参考文献：
  名称：

  Unique σ-Bond Metathesis of Silylalkynes Promoted by an ansa-Dimethylsilyl and Oxo-Bridged Uranium Metallocene

  摘要：

  The tetrachloride salt of uranium reacts with 1 equiv of the lithium ligand Li2[(C5Me4)2SiMe2] in DME to form the complex [eta5-(C5Me4)2SiMe2]UCl2.2LiCl.2DME (1), which undergoes a rapid hydrolysis in toluene to yield the dimeric bridged monochloride, monooxide complex [{[eta5-(C5Me4)2SiMe2]UCl}2(mu-O)(mu-Cl)*Li*1/2DME]2 (2). Metathesis of 2 with BuLi in DME gives the mono-bridged dibutyl complex {[eta5-(C5Me4)2SiMe2]UBu}2(mu-O) (3). Complex 2 was characterized by solid-state X-ray analysis. Complex 3 was found to be an active catalyst for the disproportionation metathesis of TMSCCH (TMS = SiMe3) and the cross-metathesis of TMSCCH or TMSCCTMS with various terminal alkynes. The metathesis of TMSCCH gives TMSCCTMS and HCCH, whereas the cross-metathesis of TMSCCH or TMSCCTMS with terminal alkynes (RCCH) yields TMSCCTMS, TMSCCR, and HCCH. In addition, TMSCCCH3 also was found to react with tBuCCH, yielding TMSCCBut and CH3CCH. A plausible mechanism for the catalytic process is presented.

  DOI：

  10.1021/ja063443x