| 140460-18-0

• CAS: 140460-18-0
• 化学式: C₃₅H₃₅MnO₅P
• 分子量: 621.572
• InChiKey: SPYCBWPKBZTEGK-UHFFFAOYSA-L

反应信息

• 作为反应物：
  描述：

  以 二氯甲烷 为溶剂， 生成
  参考文献：
  名称：

  Spectroscopic characterization of some unstable ortho-semiquinone and ortho-quinone complexes of Mn(I) by variable-temperature thin-layer spectroelectrochemistry at optically transparent electrodes

  摘要：

  Four carbonyl complexes of Mn-1 containing 3,5-di-tert.butyl-1,2-semiquinone (DBSQ) and 3,5-di-tert.butyl-1,2-benzoquinone (DBQ) ligands, the radicals [Mn(CO)(3)(L)(DBSQ)] and the cationic complexes [Mn(CO)(3)(L)(DBQ)](+) (L = H2O, PPh(3)), have been characterized for the first time by. UV-Vis spectroscopy. These compounds possess limited stability at room temperature with the exception of [Mn(CO)(3)(PPh(3))(DBSQ)] which thermally decomposes only in the presence of an excess of PPh(3). The o-(semi)quinone complexes under study were electrogenerated inside a recently developed low-temperature optically transparent thin-layer electrochemical (LT OTTLE) cell. The cell is ide ally suited far UV-Vis and IR transmission spectroelectrochemical experiments at variable temperatures and allows the study of secondary reactions of the redox products. At T = 223 K, the CO disproportionation reaction of the complexes containing the H2O ligand, decomposition of the tricarbonyl DBQ complexes, and even substitution of the axial CO ligand in [Mn(CO)(3)(PPh(3))(DBSQ)] by PPh(3) were fully inhibited. The UV-Vis spectra indicate that the observed thermal lability of the o-quinone complexes [Mn(CO)(4-n)(L)(n)(DBQ)](+) (n = 0, 1; L = H2O, PPh(3)) most likely originates from a considerably weaker pi-acceptor character of the DBQ ligand in these species than imposed in the stable, delocalized complex [Mn(CO)(2)(PPh(3))(2)(DBQ)](+).

  DOI：

  10.1016/0020-1693(94)04395-c