173274-91-4Relevant academic research and scientific papers
Palladium-catalysed Formation of Aroylcobalt Complexes from Iodoarene and Tetracarbonylcobaltate Anion. Syntheses, Characterization and Reactivities of Model Intermediate Complexes
Misumi, Yoshihiko,Ishii, Youichi,Hidai, Masanobu
, p. 3489 - 3496 (2007/10/03)
The complex showed good catalytic activity for the formation of aroylcobalt complexes from RI (R = aryl), K and PPh3.Attempts to isolate an intermediate Pd-Co complex in this catalytic reaction were unsuccessful, however a series of heterodinuclear complexes (R = Ph 1a, C6H4Me-4 1b or Me 1c), 2 and 3 have been prepared from reactions of (M = Pt or Pd, R' = Me or Ph) with K as model intermediate complexes.Prior to the formation of complex 1, transient formation of was confirmed by 31P NMR spectroscopy of the reaction solution.The reaction of with K led to the isolation of the corresponding Pt-Co complex 3, while the palladium analogue resulted in the formation of the CO insertion product 2.Crystal structures of compounds 1a, 1c, 2 and 3 were determined by X-ray diffraction analyses.Addition of ligands L such as CO, t-BuNC and PMe3 to 3 in tetrahydrofuran induced heterolytic cleavage of the Pt-Co bond to form .Thermolysis of complexes 1b and 1c under CO at 50 deg C resulted in reductive elimination of Co(OCC6H4Me-4)(CO)3(PPh3) and Co(OCMe)(CO)3(PPh3), respectively, from the platinum centre.This strongly suggests the involvement of this type of heterodinuclear Pd-Co complex in the catalytic formation of aroylcobalt complexes.
