Dicationic nickel(II) carbonyl complexes containing tetradentate ligands

Journal Article · Mon Nov 25 23:00:00 EST 1996 · Organometallics

DOI:https://doi.org/10.1021/om960416e· OSTI ID:447238

Miedaner, A; Curtis, C J; Wander, S A; Goodson, P A; DuBois, D L ^[1]

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1. National Renewable Energy Lab., Golden, CO (United States)

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(PP{sub 3}E)(CO)](BF{sub 4}){sub 2} (where PP{sub 3}E 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(NP{sub 3}E)-(CO)]{sup 2+} (where NP{sub 3}E is tris(2-(diethylphosphino)ethyl)amine) cation undergoes two reversible one-electron reductions, whereas the corresponding tetraphosphine cations undergo irreversible two-electron reductions. 26 refs., 2 figs., 2 tabs.

• OSTI ID: 447238
• Journal Information: Organometallics, Journal Name: Organometallics Journal Issue: 24 Vol. 15; ISSN ORGND7; ISSN 0276-7333
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
CARBON MONOXIDE
CARBONYLS
CATIONS
CHEMICAL BONDS
DATA ACQUISITION
ELECTROCHEMISTRY
ENZYMES
LIGANDS
MOLECULAR STRUCTURE
NICKEL COMPLEXES
NUMERICAL DATA
REDUCTION
SYNTHESIS
X-RAY DIFFRACTION