Tris(pyrazolyl)phosphine oxides. Synthesis and coordination chemistry with copper(I)

Cornelis G.J. Tazelaar, Volodymyr Lyaskovskyy, Tom Van Dijk, Daniël L.J. Broere, Ludo A. Kolfschoten, Rima Osman Hassan Khiar, Martin Lutz, J. Chris Slootweg, Koop Lammertsma

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A set of substituted tris(pyrazolyl)phosphine oxides (OP(pz x) 3) has been prepared in high yield and applied as neutral scorpion-type ligands. The P apex provides a convenient spectroscopic handle. Substitution at the 3-position of the pyrazolyl ring influences the steric demands of the ligand, while substitution at the 5-position enhances the stability. Copper(I) acetonitrile complexes of the OP(pz x) 3 ligands were prepared and tested in ligand exchange reactions with PPh 3 and CO. The v(CO) values of the carbonyl complexes demonstrate the electron-withdrawing properties of the ligands. These observations show that OP(pz x) 3 ligands are an interesting extension of the widely used scorpion-type ligands.

Original languageEnglish
Pages (from-to)3308-3315
Number of pages8
Issue number8
Publication statusPublished - 23 Apr 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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