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A mechanistically and operationally simple route to metal–N‐heterocyclic carbene (NHC) complexes

(2020) CHEMISTRY - A EUROPEAN JOURNAL. 26(20). p.4515-4519
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Abstract
We have been puzzled by the involvement of weak organic and inorganic bases in the synthesis of metal-N-heterocyclic carbene (NHC) complexes. Such bases are insufficiently strong to permit the presumed required deprotonation of the azolium salt (the carbene precursor) prior to metal binding. Experimental and computational studies provide support for a base-assisted concerted process that does not require free NHC formation. The synthetic protocol was found applicable to a number of transition-metal- and main-group-centered NHC compounds and could become the synthetic route of choice to form M-NHC bonds.
Keywords
General Chemistry, complexes, mechanism, N-heterocyclic carbenes, synthesis, weak bases, IONIC LIQUIDS, C-C, EFFICIENT, ARYLATION, LIGANDS, ACID, BR

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Citation

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MLA
Tzouras, Nikolaos, et al. “A Mechanistically and Operationally Simple Route to Metal–N‐heterocyclic Carbene (NHC) Complexes.” CHEMISTRY - A EUROPEAN JOURNAL, vol. 26, no. 20, 2020, pp. 4515–19, doi:10.1002/chem.202000564.
APA
Tzouras, N., Nahra, F., Falivene, L., Cavallo, L., Saab, M., Van Hecke, K., … Nolan, S. (2020). A mechanistically and operationally simple route to metal–N‐heterocyclic carbene (NHC) complexes. CHEMISTRY - A EUROPEAN JOURNAL, 26(20), 4515–4519. https://doi.org/10.1002/chem.202000564
Chicago author-date
Tzouras, Nikolaos, Fady Nahra, Laura Falivene, Luigi Cavallo, Marina Saab, Kristof Van Hecke, Alba Collado, et al. 2020. “A Mechanistically and Operationally Simple Route to Metal–N‐heterocyclic Carbene (NHC) Complexes.” CHEMISTRY - A EUROPEAN JOURNAL 26 (20): 4515–19. https://doi.org/10.1002/chem.202000564.
Chicago author-date (all authors)
Tzouras, Nikolaos, Fady Nahra, Laura Falivene, Luigi Cavallo, Marina Saab, Kristof Van Hecke, Alba Collado, Christopher J. Collett, Andrew D. Smith, Catherine Cazin, and Steven Nolan. 2020. “A Mechanistically and Operationally Simple Route to Metal–N‐heterocyclic Carbene (NHC) Complexes.” CHEMISTRY - A EUROPEAN JOURNAL 26 (20): 4515–4519. doi:10.1002/chem.202000564.
Vancouver
1.
Tzouras N, Nahra F, Falivene L, Cavallo L, Saab M, Van Hecke K, et al. A mechanistically and operationally simple route to metal–N‐heterocyclic carbene (NHC) complexes. CHEMISTRY - A EUROPEAN JOURNAL. 2020;26(20):4515–9.
IEEE
[1]
N. Tzouras et al., “A mechanistically and operationally simple route to metal–N‐heterocyclic carbene (NHC) complexes,” CHEMISTRY - A EUROPEAN JOURNAL, vol. 26, no. 20, pp. 4515–4519, 2020.
@article{8654444,
  abstract     = {We have been puzzled by the involvement of weak organic and inorganic bases in the synthesis of metal-N-heterocyclic carbene (NHC) complexes. Such bases are insufficiently strong to permit the presumed required deprotonation of the azolium salt (the carbene precursor) prior to metal binding. Experimental and computational studies provide support for a base-assisted concerted process that does not require free NHC formation. The synthetic protocol was found applicable to a number of transition-metal- and main-group-centered NHC compounds and could become the synthetic route of choice to form M-NHC bonds.},
  author       = {Tzouras, Nikolaos and Nahra, Fady and Falivene, Laura and Cavallo, Luigi and Saab, Marina and Van Hecke, Kristof and Collado, Alba and Collett, Christopher J. and Smith, Andrew D. and Cazin, Catherine and Nolan, Steven},
  issn         = {0947-6539},
  journal      = {CHEMISTRY - A EUROPEAN JOURNAL},
  keywords     = {General Chemistry,complexes,mechanism,N-heterocyclic carbenes,synthesis,weak bases,IONIC LIQUIDS,C-C,EFFICIENT,ARYLATION,LIGANDS,ACID,BR},
  language     = {eng},
  number       = {20},
  pages        = {4515--4519},
  title        = {A mechanistically and operationally simple route to metal–N‐heterocyclic carbene (NHC) complexes},
  url          = {http://dx.doi.org/10.1002/chem.202000564},
  volume       = {26},
  year         = {2020},
}

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