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Cooperative or Oxidative Hydrogen Addition to 2-Hydroxypyridonate Iridium Complexes : Dependence on Oxidation State

Forrest, Sebastian J.K. ; Manojveer, Seetharaman and Johnson, Magnus T. LU (2017) In European Journal of Inorganic Chemistry 2017(26). p.3239-3243
Abstract

Iridium(III)–pyridone complexes are commonly found to react in a cooperative and redox-neutral manner with dihydrogen and alcohols. In this work, the reactivity preferences of IrI–pyridone complexes were investigated under a variety of conditions. We have found that, in contrast to IrIII–pyridones, IrI–pyridone complexes display a strong preference to react non-cooperatively. With a new chelating 2-hydroxy-8-diphenylphosphinoquinoline ligand that does not dissociate after hydrogen addition, oxidative addition is still preferred. In the preparation of mono- and bidentate neutral and anionic pyridone ligands, Vaska's complex was used as a point of reference. We expect these findings to have implications... (More)

Iridium(III)–pyridone complexes are commonly found to react in a cooperative and redox-neutral manner with dihydrogen and alcohols. In this work, the reactivity preferences of IrI–pyridone complexes were investigated under a variety of conditions. We have found that, in contrast to IrIII–pyridones, IrI–pyridone complexes display a strong preference to react non-cooperatively. With a new chelating 2-hydroxy-8-diphenylphosphinoquinoline ligand that does not dissociate after hydrogen addition, oxidative addition is still preferred. In the preparation of mono- and bidentate neutral and anionic pyridone ligands, Vaska's complex was used as a point of reference. We expect these findings to have implications for catalyst development in the field of metal–ligand cooperation.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrides, Iridium, Metal–ligand cooperation, N ligands
in
European Journal of Inorganic Chemistry
volume
2017
issue
26
pages
5 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • wos:000405459900004
  • scopus:85024125447
ISSN
1434-1948
DOI
10.1002/ejic.201700534
language
English
LU publication?
yes
id
77c03ab3-154d-419c-9b00-467029e0147d
date added to LUP
2017-07-27 09:44:58
date last changed
2025-01-07 17:52:15
@article{77c03ab3-154d-419c-9b00-467029e0147d,
  abstract     = {{<p>Iridium(III)–pyridone complexes are commonly found to react in a cooperative and redox-neutral manner with dihydrogen and alcohols. In this work, the reactivity preferences of Ir<sup>I</sup>–pyridone complexes were investigated under a variety of conditions. We have found that, in contrast to Ir<sup>III</sup>–pyridones, Ir<sup>I</sup>–pyridone complexes display a strong preference to react non-cooperatively. With a new chelating 2-hydroxy-8-diphenylphosphinoquinoline ligand that does not dissociate after hydrogen addition, oxidative addition is still preferred. In the preparation of mono- and bidentate neutral and anionic pyridone ligands, Vaska's complex was used as a point of reference. We expect these findings to have implications for catalyst development in the field of metal–ligand cooperation.</p>}},
  author       = {{Forrest, Sebastian J.K. and Manojveer, Seetharaman and Johnson, Magnus T.}},
  issn         = {{1434-1948}},
  keywords     = {{Hydrides; Iridium; Metal–ligand cooperation; N ligands}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{26}},
  pages        = {{3239--3243}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{European Journal of Inorganic Chemistry}},
  title        = {{Cooperative or Oxidative Hydrogen Addition to 2-Hydroxypyridonate Iridium Complexes : Dependence on Oxidation State}},
  url          = {{http://dx.doi.org/10.1002/ejic.201700534}},
  doi          = {{10.1002/ejic.201700534}},
  volume       = {{2017}},
  year         = {{2017}},
}