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Cited by 329

The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.

Abnormal C5-Bound N-Heterocyclic Carbenes: Extremely Strong Electron Donor Ligands and Their Iridium(I) and Iridium(III) Complexes

Chianese, Anthony R., Kovacevic, Anes, Zeglis, Brian M., Faller, J. W., Crabtree, Robert H.·2004·Organometallics

Abstract

Imidazolium salts are found to bind abnormally via C5 to iridium(I) and iridium(III) to give air-stable monodentate N-heterocyclic carbene complexes. Abnormal ligand binding was verified by X-ray diffraction in both Ir(I) and Ir(III) complexes. In the case of Ir(I), it is necessary to block the C2 and C4 positions to form a stable sterically protected C5-bound complex. Infrared spectroscopy on carbonyl derivatives indicates that abnormally bound N-heterocyclic carbenes are much stronger electron donors than their ubiquitous C2-bound counterparts. The Tolman electronic parameter for 1-isopropyl-2,4-diphenyl-3-methylimidazolin-5-ylidene is 2039 cm - 1, compared to ca. 2050 cm - 1 for typical NHCs.

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Metadata

Authors
Chianese, A. R., Kovacevic, A., Zeglis, B. M., Faller, J. W., & Crabtree, R. H.
Venue
Organometallics
Published
2004-04-15
Volume
23
Issue
10
Pages
2461-2468
ISSN
  • 0276-7333 (ISSN-L)
  • 1520-6041
OpenAlex
W2011851250
Cited by
329
References
10
FWCI
12.50
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Abnormal C5-Bound N-Heterocyclic Carbenes: Extremely Strong Electron Donor Ligands and Their Iridium(I) and Iridium(III) Complexes. https://app.cochat.ai/papers/10.1021/om049903h
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Chianese, A. R., Kovacevic, A., Zeglis, B. M., Faller, J. W., & Crabtree, R. H. (2004). Abnormal C5-Bound N-Heterocyclic Carbenes: Extremely Strong Electron Donor Ligands and Their Iridium(I) and Iridium(III) Complexes. Organometallics. https://doi.org/10.1021/om049903h

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