Re(CO)3(PPh3)(3,5-di-tert-butyl-1,2-benzosemiquinone) | 84025-23-0

• 英文名称: Re(CO)3(PPh3)(3,5-di-tert-butyl-1,2-benzosemiquinone)
• CAS: 84025-23-0
• 化学式: C₃₅H₃₅O₅PRe
• 分子量: 752.841
• InChiKey: GRHUOYYYTMXXHO-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  Re(CO)4(O,O-o-3,5-di-tert-butyl-1,2-benzosemiquinone) 在 三苯基膦 作用下， 以 苯 为溶剂， 生成 Re(CO)3(PPh3)(3,5-di-tert-butyl-1,2-benzosemiquinone)
  参考文献：
  名称：

  ESR研究有机金属自由基络合物中的配体交换。醌-羰基hen顺磁性配合物中的VA族有机金属取代

  摘要：

  通过配体交换反应制备了含有羰基rh和VA族有机金属的稳定的杂双核和三核金属有机自由基配合物。ESR观测可提供有关动力学和可能的交换站点的进一步见解。

  DOI：

  10.1016/0009-2614(81)85650-3

文献信息

• Bonding properties of 3,5-di-tert-butyl-1,2-benzosemiquinone radical-anionic ligand: resonance Raman spectra of Re(CO)4(DBSQ) and Re(CO)3(PPH3)(DBSQ) complexes
  作者：F. Hartl、A. Vlček、D.J. Stufkens

  DOI：10.1016/s0020-1693(00)83169-2

  日期：1992.2

  Absorption spectra in the visible region and resonance Raman spectra of the spin-doublet Re(CO)4-n(PPh3)n(DBSQ) (n = 0,1) complexes were measured in order to obtain information on the nature of their electronic transitions and excited states. Qualitative Raman excitation profiles measured across the visible absorption band of both complexes point to the presence of two electronic transitions. Based on the rR data, both transitions are identified as d(pi) --> pi*SOMO of the DBSQ ligand. These transitions have essentially MLCT character, with only very small amount of mixing between the metal and ligand-SOMO orbitals. The spectral assignment is also supported by the shift of the spectral band going from the tetracarbonyl to the tricarbonyl-phosphine complex and by the solvatochromism observed for the latter one. From these spectral data, the DBSQ radical-anion emerges as a ligand lacking any pronounced pi-bonding properties toward the Re central atom. At best, it can be viewed as a very weak pi-acceptor. This bonding picture is also supported by the EPR and IR data.