215788-65-1Relevant articles and documents
Bidentate ferrocenylphosphines and their palladium(II)dichloride complexes - X-ray structural and NMR spectroscopic investigations and first results of their characteristics in the Pd-catalysed cooligomerisation of 1,3-butadiene with CO2
Elsagir, Anja R.,Ga?ner, Franz,G?rls, Helmar,Dinjus, Eckhard
, p. 139 - 145 (2000)
The chiral 1,1′-bis(di(+)-menthylphosphino)ferrocene (dmenpf, 1b) and achiral 1,1′-bis(diisopropylphosphino)ferrocene (disoppf, 1a) were prepared from the corresponding tertiary chlorophosphines 2b and 2a and the dilithiated ferrocene-TMEDA complex as analytically pure crystals. The synclinic eclipsed conformation of the Cp rings and the Cp(1)-Fe-Cp(1)′ angle in 1b was determined to be 175.0(2)° by X-ray structure analysis. With H2[PdCl4] 1a forms the bimetallic complex (disoppf)PdCl2 (3a). In contrast to the structure of the free ligand disoppf (1a), the X-ray structure of 3a and the NMR spectra in solution as well as in the solid state show that the P atoms are chemically and magnetically equivalent. The conformation of the Cp rings converts from an eclipsed to a staggered conformation. The ferrocene-based ligands show significant activity in the Pd-catalysed cooligomerisation of 1,3-butadiene with CO2