Oxidative Addition of Aryl Halides to a Ni(I)-Bipyridine Complex
Journal Article
·
· Journal of the American Chemical Society
- Princeton Univ., NJ (United States); Univ. of California, Los Angeles, CA (United States); University of California, Los Angeles
- Princeton Univ., NJ (United States); Univ. of California, Los Angeles, CA (United States)
The oxidative addition of aryl halides to bipyridine- or phenanthroline-ligated nickel(I) is a commonly proposed step in nickel catalysis. However, there is a scarcity of complexes of this type that both are well-defined and undergo oxidative addition with aryl halides, hampering organometallic studies of this process. Here, we report the synthesis of a well-defined Ni(I) complex, [(CO2Etbpy)NiICl]4. Its solution-phase speciation is characterized by a significant population of monomer and a redox equilibrium that can be perturbed by π-acceptors and σ-donors. 1 reacts readily with aryl bromides, and mechanistic studies are consistent with a pathway proceeding through an initial Ni(I) → Ni(III) oxidative addition to form a Ni(III) aryl species. Such a process was demonstrated stoichiometrically for the first time, affording a structurally characterized Ni(III) aryl complex.
- Research Organization:
- Princeton Univ., NJ (United States); Univ. of California, Los Angeles, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); NIGMS
- Grant/Contract Number:
- SC0019370
- OSTI ID:
- 1865641
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 12 Vol. 144; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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