| 175447-92-4

• CAS: 175447-92-4
• 化学式: C₂₄H₃₆B₉Rh
• 分子量: 524.754
• InChiKey: VOOYZXZLQYOXDQ-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  Tl2{7-Ph-7,8-nido-C2B9H10} 、 以 二氯甲烷 为溶剂， 以48%的产率得到
  参考文献：
  名称：

  Synthesis, characterisation and molecular structures of the closo and pseudocloso heptamethylindenyl carbarhodaboranes 1-Ph-3-(η-C₉Me₇)-3,1,2-closo-RhC₂B₉H₁₀and 1,2-Ph₂-3-(η-C₉Me₇)-3,1,2-pseudocloso-RhC₂B₉H₉. Experimental assignment of the¹¹B NMR spectrum of a pseudocloso carbametallaborane

  摘要：

  The reaction between [(RhCl2(eta-C(9)Me(7)))(2)] and Tl-2[7-Ph-8-R-7,8-nido-C2B9H9] (R = H or Ph) in CH2Cl2 afforded the heptamethylindenyl carbarhodaboranes 1-Ph-3-(eta-C(9)Me(7))-3,1,2-RhC2B9H10 1 and 1,2-Ph(2)-3-(eta-C(9)Me(7))-3,1,2-RhC2B9H9 2, respectively, in good yields. The B-11 NMR chemical shifts of 1 and 2 showed that they possess close and pseudocloso structures, respectively. Compound 1 was found to be fluctional in solution at room temperature via rotation of the Ph substituent, but cooling below ca. 230 K arrested this process, presumably by locking the indenyl ligand into its preferred cisoid conformation and preventing phenyl rotation. An X-ray diffraction study of a single crystal of 1 confirmed both the close nature of the cage and the cisoid conformation, but additionally showed that, of two possible cisoid conformations, the one adopted places the cage phenyl substituent underneath the six-membered ring of the indenyl group. Compound 2 was also subjected to crystallographic analysis, which confirmed the pseudocloso nature of the cage. Again, the relative conformation of the two eta-bonded ligands is cisoid. An B-11-B-11 COSY spectrum of compound 2, the first to be recorded from a pseudocloso species, allowed experimental assignment of the B-11 chemical shifts which were in excellent agreement with those previously obtained theoretically.

  DOI：

  10.1039/dt9960000335