8,8'-bis(1,4-dimethyl-7-isopropylazulenide)ytterbium pyridinate | 681007-93-2

• 英文名称: 8,8'-bis(1,4-dimethyl-7-isopropylazulenide)ytterbium pyridinate
• 英文别名: ansa-(η5-Gaz)2Yb(Py)2*Py；ansa-(η5-1,4-dimethyl-7-isopropylazulene)2Yb(Py)2*Py
• CAS: 681007-93-2
• 化学式: C₅H₅N*C₄₀H₄₆N₂Yb
• 分子量: 806.96
• InChiKey: UTMCDJBZSLRRRY-ZYOJYBKFSA-N

反应信息

• 作为产物：
  描述：

  吡啶 、 8,8'-bis(1,4-dimethyl-7-isopropylazulenide)ytterbium tetrahydrofuranate 以 吡啶 为溶剂， 生成 8,8'-bis(1,4-dimethyl-7-isopropylazulenide)ytterbium pyridinate
  参考文献：
  名称：

  摘要：

  ansa-Metallocene derivative (eta(5)-Gaz)(2)Ca(THF)(2) (1) (Gaz = 1,4-dimethyl-7-isopropyl-azulene) was synthesized by the reaction of CaI2(THF)(2) with two equivalents of potassium and two equivalents of guaiazulene in THE The ytterbium analog ansa-(eta(5)-Gaz)(2)Yb(THF)(2) (2a) was synthesized by the reduction of guaiazulene with ytterbium naphthalenide in THE The recrystallization of 2a from pyridine leads to the exchange of the coordinated solvent molecules and gives ansa-(eta(5)-Gaz)(2)Yb(NC5H5)(2) (2b). The molecular structures of 1, 2a, and 2b were determined by X-ray diffraction analysis. The crystals of 1, 2a, and 2c consist of a racemic mixture of both R,R- and S,S-enantiomers. The calcium and ytterbium atoms eta(5)-coordinate the five-membered rings of the guaiazulene ligands. The H-1 NMR spectroscopic and X-ray diffraction data unambiguously confirm the exclusive formation of C-2-symmetric ansa-metallocenes in these reactions. The reaction of compound 1 with Me3SiCl in THF occurs with retention of the C-C bond between two guaiazulene moieties and affords bis(1,4-dimethyl-3-trimethylsilyl-7-isopropylazulene) (3) in high yield.

  DOI：

  10.1023/a:1024827127959