Mononuclear Rhodium(II) and Iridium(II) Complexes Supported by Tetradentate Pyridinophane Ligands

The tetradentate ligands N,N′-dialkyl-2,11-diaza­[3,3]­(2,6)­pyridinophane (RN4, where R = Me or tBu) were employed to synthesize and fully characterize [(RN4)­MI(COD)]+ complexes (M = Rh or Ir; COD = cyclooctadiene). Interestingly, these complexes exhibit accessible oxidation potentials and can gen...

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Bibliographic Details
Published in:Inorganic chemistry 2017-08, Vol.56 (16), p.9404-9408
Main Authors: Fuchigami, Kei, Rath, Nigam P, Mirica, Liviu M
Format: Article
Language:English
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Summary:The tetradentate ligands N,N′-dialkyl-2,11-diaza­[3,3]­(2,6)­pyridinophane (RN4, where R = Me or tBu) were employed to synthesize and fully characterize [(RN4)­MI(COD)]+ complexes (M = Rh or Ir; COD = cyclooctadiene). Interestingly, these complexes exhibit accessible oxidation potentials and can generate detectable [(RN4)­MII(COD)]2+ complexes, which were characterized by electron paramagnetic resonance and high-resolution electrospray ionization mass spectrometry. Moreover, a rare mononuclear [(MeN4)­RhII(COD)]2+ complex was isolated and crystallographically characterized, allowing for a direct comparison with its rhodium­(I) analogue. The detailed characterization of such paramagnetic rhodium­(II) and iridium­(II) complexes enables further investigation of their redox reactivity.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.7b01619