214829-53-5Relevant academic research and scientific papers
Synthesis, characterization and structure of rhodium(I) carbonyl complexes with O,P-chelating 1'-(diphenylphosphino)ferrocenecarboxylate or P-monodentate 1'-(diphenylphosphino)ferrocenecarboxylic acid
Stepnicka, Petr,Cisarova, Ivana
, p. 2807 - 2812 (2007/10/03)
The reaction of 1'-(diphenylphosphino)ferrocenecarboxylic acid (Hdpf) with (X = Cl or Br) afforded rhodium(I) complexes trans- containing the ligand as the P-bonded phosphine.On the other hand, pentane-2,4-dionato rhodium(I) complexes reacted with Hdpf by an acid-base reaction yielding novel O,P-chelated rhodium(I) complexes and pentane-2,4-dione (Hacac).The compound reacted with 2 equivalents of Hdpf to give trans- which exhibits proton exchange between the two forms of the ligand.Likewise, related complexes , where PR3 = PCy3, PPh3 or PPh2Fc (Cy = cyclohexyl, Fc = ferrocenyl), afforded the corresponding complexes trans-.The formation of the O,P chelates is regioselective and might be considered as a rather unusual displacement of pentane-2,4-dionate by the phosphinocarboxylate dpf with concurrent proton exchange.All the compounds were characterized by 1H, 13C, 31P and IR spectroscopies and by FAB mass spectrometry.The crystal structure determination of trans- confirmed the presence of an unprecedented heteroannular O,P-chelating ferrocene ligand.
