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Oxidative Addition of Aryl Halides to a Ni(I)-Bipyridine Complex

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.2c00462· OSTI ID:1865641
 [1];  [2];  [2]
  1. Princeton Univ., NJ (United States); Univ. of California, Los Angeles, CA (United States); University of California, Los Angeles
  2. 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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