Homo- and heteroleptic group 4 2-(diphenylphosphino)pyrrolide complexes: Synthesis, coordination chemistry and solution state dynamics

Peter L. Dunn, Alexander H. Reath, Laura J. Clouston, Victor G. Young, Ian A. Tonks

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The synthesis and solid state structures of homo- and heteroleptic Zr and Ti complexes of 2-(diphenylphosphino)pyrrolide (NP) are reported. The homoleptic Zr(NP)4 (1) and Ti(NP)4 (2) are 8-coordinate in the solid state, and both show extremely long M-P bonds of approximately 2.9 Å. In solution, the phosphine ligands in all complexes are labile: in the titanium complexes phosphine dissociation is rapid at room temperature and equilibrates all phosphines into a single 31P resonance, whereas in the Zr complex 1 dissociation is slower and full equilibration does not occur until 90 °C. The potential to utilize these novel complexes as metalloligands toward other transition metals is discussed.

Original languageEnglish (US)
Pages (from-to)111-119
Number of pages9
JournalPolyhedron
Volume84
DOIs
StatePublished - Dec 14 2014

Keywords

  • Group 4 metal
  • Metalloligand
  • NMR
  • Phosphine ligand
  • Variable temperature
  • X-ray crystallography

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