volume 139 issue 15 pages 5378-5386

Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition

Publication typeJournal Article
Publication date2017-04-10
scimago Q1
wos Q1
SJR5.554
CiteScore22.5
Impact factor15.6
ISSN00027863, 15205126
PubMed ID:  28394586
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
A discrete, dicopper μ-alkynyl complex, [Cu2(μ-η1:η1-C≡C(C6H4)CH3)DPFN]NTf2 (DPFN = 2,7-bis(fluoro-di(2-pyridyl)methyl)-1,8-naphthyridine; NTf2- = N(SO2CF3)2-), reacts with p-tolylazide to yield a dicopper complex with a symmetrically bridging 1,2,3-triazolide, [Cu2(μ-η1:η1-(1,4-bis(4-tolyl)-1,2,3-triazolide))DPFN]NTf2. This transformation exhibits bimolecular reaction kinetics and represents a key step in a proposed, bimetallic mechanism for copper-catalyzed azide-alkyne cycloaddition (CuAAC). The μ-alkynyl and μ-triazolide complexes undergo reversible redox events (by cyclic voltammetry), suggesting that a cycloaddition pathway involving mixed-valence dicopper species might also be possible. Synthesis and characterization of the mixed-valence μ-alkynyl dicopper complex, [Cu2(μ-η1:η1-C≡C(C6H4)CH3)DPFN](NTf2)2, revealed an electronic structure with an unexpected partially delocalized spin, as evidenced by electron paramagnetic resonance spectroscopy. Studies of the mixed-valence μ-alkynyl complex's reactivity suggest that a mixed-valence pathway is less likely than one involving intermediates with only copper(I).
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Ziegler M. S. et al. Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition // Journal of the American Chemical Society. 2017. Vol. 139. No. 15. pp. 5378-5386.
GOST all authors (up to 50) Copy
Ziegler M. S., Lakshmi K., Tilley T. D. Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition // Journal of the American Chemical Society. 2017. Vol. 139. No. 15. pp. 5378-5386.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/jacs.6b13261
UR - https://doi.org/10.1021/jacs.6b13261
TI - Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition
T2 - Journal of the American Chemical Society
AU - Ziegler, Micah S
AU - Lakshmi, K.V.
AU - Tilley, T. Don
PY - 2017
DA - 2017/04/10
PB - American Chemical Society (ACS)
SP - 5378-5386
IS - 15
VL - 139
PMID - 28394586
SN - 0002-7863
SN - 1520-5126
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{2017_Ziegler,
author = {Micah S Ziegler and K.V. Lakshmi and T. Don Tilley},
title = {Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition},
journal = {Journal of the American Chemical Society},
year = {2017},
volume = {139},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/jacs.6b13261},
number = {15},
pages = {5378--5386},
doi = {10.1021/jacs.6b13261}
}
MLA
Cite this
MLA Copy
Ziegler, Micah S., et al. “Dicopper Cu(I)Cu(I) and Cu(I)Cu(II) Complexes in Copper-Catalyzed Azide–Alkyne Cycloaddition.” Journal of the American Chemical Society, vol. 139, no. 15, Apr. 2017, pp. 5378-5386. https://doi.org/10.1021/jacs.6b13261.