Dicationic nickel(II) carbonyl complexes containing tetradentate ligands

Alex Miedaner, Calvin J. Curtis, Sheryl A. Wander, Patricia A. Goodson, Daniel L DuBois

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


This article describes the preparation and spectroscopic characterization of three dicationic Ni(II) carbonyl complexes containing tripodal tetradentate ligands. An X-ray diffraction study of [Ni(PP3E)(CO)](BF4)2 (where PP3E is tris(2-(diethylphosphino)ethyl)phosphine) has been completed and confirms a trigonal bipyramidal structure with an apical carbonyl ligand. The binding of CO is weak and reversible. The stability of these complexes is enhanced by the small chelate bite imposed by the tetradentate ligands. The electrochemical behavior of these complexes depends on the nature of the donor atom trans to CO. The [Ni(NP3E)-(CO)]2+ (where NP3E is tris(2-(diethylphosphino)ethyl)amine) cation undergoes two reversible one-electron reductions, whereas the corresponding tetraphosphine cations undergo irreversible two-electron reductions.

Original languageEnglish
Pages (from-to)5185-5190
Number of pages6
Issue number24
Publication statusPublished - Nov 26 1996

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry

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