90826-86-1Relevant articles and documents
Phosphinocyclopentadienide via Cyclopentadienylphosphide
Schmidpeter, Alfred,Zirzow, Karl-Heinz
, p. 977 - 983 (2007/10/02)
Lithiumorganyls RLi (R = Me, Bu, Ph) add to (PhP)5 in successive degradation and disproportionation equilibria depending on the ratio of the reactants.At -70 deg C (R = Me) disproportionation is blocked and (PhP)4R(-) and (PhP)3R(-) can be detected.With excess RLi monophosphides PhPR(-) are formed.CpNa with the help of a crown ether degrades (PhP)5 or substitutes cyanide from PhPCN(-) to give an equilibrium mixture of (PhP)nCp(-) anions, which stabilize by proton shifts: In case of n = 1 and 2 a shift from the Cp unit to the terminal phosphorus results in the formation of the phenylphosphino- and diphenyldiphosphino-cyclopentadienide anion, in case of n = 3 two proton shifts within the Cp unit result in a cyclopenteno-1,2,3-triphospholene allylic anion. - Keywords: Cyclophosphane, Cyclopentadienide, Nucleophilic Degradation, 31P NMR Spectra