729610-15-5Relevant academic research and scientific papers
Coordination chemistry with phosphine and phosphine oxide-substituted hydroxyferrocenes
Atkinson, Robert C. J.,Gibson, Vernon C.,Long, Nicholas J.,White, Andrew J. P.
, p. 7540 - 7546 (2011/01/05)
New unsymmetrical hydroxyferrocenes were synthesised from dibromoferrocene. The oxygen heteroatom was introduced via lithiation and quenching with bis-trimethylsilylperoxide followed by hydrolysis to unmask the hydroxyl functionality. The coordination chemistry of 1′-(diphenylphosphino)-1- hydroxyferrocene 2 was explored with palladium and rhodium precursors. A dinuclear palladium methyl complex with bridging ferrocenyloxo groups was obtained from the reaction between 2 and (cyclooctadiene) methylchloropalladium(ii). With tetracarbonyldichlorodirhodium(i), two complexes were isolated. The major product was a bis ligand cis phosphine ligated complex with one ligand bound in a chelating mode and one with a pendant hydroxyl group. A minor product was crystallographically characterised as a dinuclear ferrocenyloxo-bridged rhodium carbonyl complex. The coordination chemistry of 2 and the corresponding phosphine oxide 3 was examined with group 4 metals and the resulting complexes examined as ethylene polymerisation catalysts. The ligands were found to bind in either a chelating fashion or with pendant phosphine donors. In all cases, low to moderately active ethylene polymerisation catalysts were found. The catalysts were very unstable and catalyst residues were observed in the isolated polymer indicating a short catalyst lifetime.
Novel unsymmetrical P/O substituted ferrocene ligands and the first structurally characterised hydroxyferrocene derivative
Atkinson, Robert C. J.,Gibson, Vernon C.,Long, Nicholas J.,White, Andrew J. P.,Williams, David J.
, p. 1823 - 1826 (2007/10/03)
Two new unsymmetrical 1′-substituted hydroxyferrocene ligands featuring either phosphine or phosphine oxide substituents have been synthesised and the phosphine oxide derivative has been structurally characterised. A nickel complex of the hydroxyl/phosphine ligand has been formed, along with preliminary evaluation of the complex for catalysis of ethylene polymerisation. The Royal Society of Chemistry 2004.
