[(4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene)Th(CH2SiMe3)(η6-toluene)][B(C6F5)4] | 1133953-63-5

• 英文名称: [(4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene)Th(CH2SiMe3)(η6-toluene)][B(C6F5)4]
• CAS: 1133953-63-5
• 化学式: C₂₄BF₂₀*C₅₈H₈₁N₂OSiTh
• 分子量: 1761.46
• InChiKey: WVLPZHWVACCVAJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  [(4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene)Th(CH2SiMe3)2] 、 甲苯 、 三苯碳四(五氟苯基)硼酸盐 以 甲苯 为溶剂， 生成 [(4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene)Th(CH2SiMe3)(η6-toluene)][B(C6F5)4]
  参考文献：
  名称：

  Cationic Thorium Alkyl Complexes of Rigid NON- and NNN-Donor Ligands: π-Arene Coordination as a Persistent Structural Motif

  摘要：

  Reaction of the neutral dialkyl complex [(XA(2))Th(CH2SiMe3)(2)] {1; XA(2) = 4,5-bis(2,6-diisopropylanilido)-2,7-di-tert-butyl-9,9-dimethylxanthene} with [CPh3][B(C6F5)(4)] in benzene or toluene at room temperature resulted in the formation of [(XA(2))Th(CH2SiMe3)(eta(6)-arene)][B(C6F5)(4)] {arene = C6H6 (5) and toluene (5B)}, which were characterized by H-1, C-13, and 2D NMR spectroscopy and by X-ray crystallography (for 5). In close analogy, reaction of [(XA(2))Th(CH2Ph)(2)] (3) with [CPh3][B(C6F5)(4)] in toluene at room temperature resulted in the formation of 1 equiv of Ph3CCH2R (R = Ph) and precipitation of an insoluble orange-brown oil, which upon layering with hexanes yielded crystals of [(XA(2))Th(eta(2)-CH2Ph)(eta(6)- C6H5Me)][B(C6F5)(4)] (6). NMR investigation of the reactions of 1 and 3 with substoichiometric amounts of [CPh3][B(C6F5)(4)] provided no evidence for dinuclear monocation formation. By contrast, reaction of [(BDPP)Th(CH2Ph)(2)] {4; BDPP = 2,6-bis(2,6-diisopropylanilidomethyl)pyridine) with 0.5 equiv of [CPh3][B(C6F5)(4)] resulted in the precipitation of an insoluble oil containing a mixture of a mononuclear and a dinuclear cation; the dinuclear cation was identified as [(BDPP)Th(eta(2)-CH2Ph)(mu-eta(1): eta(6)-CH2Ph)Th(eta(1)-CH2Ph)(BDPP)[B(C6F5)(4)] (7) by X-ray crystallography. Reaction of complex 3 with B(C6F5)(3) resulted in the formation of [(XA(2))Th(eta(1)-CH2Ph)] [eta(6)-PhCH2B(C6F5)(3)] (9), which was characterized in solution by NMR spectroscopy. Complexes 5, 5B, and 6 are rare examples of arene solvent-separated ion pairs, complex 9 exists as a tight contact ion pair, and dinuclear 7 exhibits a unique benzyl ligand bridging mode. The structures of cations 5-7 and 9 highlight a pronounced tendency for these systems to engage in arene pi-coordination.

  DOI：

  10.1021/om800624t