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Published December 20, 2021 | public
Journal Article Open

Probing Redox Non-Innocence in Iron–Carbene Complexes {Fe=C(H)Ar}¹⁰⁻¹¹ by ^(1,2)H and ¹³C Pulse Electron Paramagnetic Resonance


We report the synthesis and spectroscopic characterization of a series of iron-carbene complexes in redox states {Fe=C(H)Ar}¹⁰⁻¹¹. Pulse EPR studies of the ^(1,2)H and ¹³C isotopologues of {Fe=C(H)Ar}¹¹ reveal the high covalency of the Fe–carbene bonding, leading to a more even spin distribution than commonly observed for reduced Fischer carbenes.

Additional Information

© 2021 Wiley-VCH GmbH. Issue Online: 13 December 2021; Version of Record online: 10 November 2021; Accepted manuscript online: 25 October 2021; Manuscript received: 09 August 2021. We are grateful to the NSF for funding (CHE-1905320 to T.A. and an NSF Graduate Research Fellowship to C.H.A.). We thank Prof. Jonas Peters for the use of his group's Mössbauer spectrometer. We thank Michael Takase and Lawrence Henling for assistance with X-ray crystallography and David VanderVelde for assistance with NMR spectroscopy. Support has been provided for the Caltech EPR Facility via an NSF grant (1531940) and the Dow Next Generation Educator Fund, which is also acknowledged for support of the X-ray diffraction and NMR instrumentation. The computations presented here were conducted on the Caltech High Performance Cluster partially supported by a grant from the Gordon and Betty Moore Foundation. The authors declare no conflict of interest.

Attached Files

Accepted Version - anie.202110704.pdf

Supplemental Material - anie202110704-sup-0001-misc_information.pdf


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August 22, 2023
August 22, 2023