[Rh(pyridine)3(PPh3)]ClO4 | 159399-03-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: [Rh(pyridine)3(PPh3)]ClO4
• CAS: 159399-03-8
• 化学式: C₃₃H₃₀N₃PRh*ClO₄
• 分子量: 701.951
• InChiKey: PAQSPPPDTRUPAU-UHFFFAOYSA-M

反应信息

• 作为产物：
  描述：

  bis(ethylene)rhodium(I) chloride dimer 、 silver perchlorate 在 吡啶 、 三苯基膦 作用下， 以 吡啶 为溶剂， 生成 [Rh(pyridine)3(PPh3)]ClO4
  参考文献：
  名称：

  Reactions of Wilkinson's catalyst with pyridine; observation of rhodium complexes containing both pyridine and phosphine ligandst

  摘要：

  Dissolution of [RhCl(PPh3)3], Wilkinson's catalyst, in pyridine affords an efficient catalyst for the selective reductive coupling of aldehydes. The reaction requires a close balance of the hydrogenating power and alkyl coupling ability of the catalyst. The species present in the pyridine solution of Wilkinson's catalyst have been studied in order to probe the origin of this selectivity. Pyridine has been found to replace one or more of the phosphine ligands in the precursor complex to give complexes of the type [RhCl(py)x(PPh3)3-x] (py = pyridine, x = 1 or 2) and [Rh(py)x(PPh3)4-x]Cl (x = 1, 2 or 3). The reactions of these complexes with hydrogen have been shown to give cis-dihydride complexes via oxidative addition. The complex trans-[Rh(CO)(py)(PPh3)2]ClO4 has been synthesised and characterised spectroscopically and found not to react with H-2 at room temperature. Preliminary in situ NMR measurements have shown that under the conditions of the catalysis either phosphine or pyridine can be replaced by a CO ligand. This results in a marked decrease in the activity of the rhodium centre towards oxidative addition of hydrogen and in the stability, with respect to elimination of H-2, of the dihydride.

  DOI：

  10.1039/dt9940002875