|Title:||Investigation of Organoiron Catalysis in Kumada–Tamao–Corriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X-ray Absorption Spectroscopy|
|Authors:||Takaya, Hikaru https://orcid.org/0000-0003-4688-7842 (unconfirmed)|
Isozaki, Katsuhiro https://orcid.org/0000-0002-0990-1708 (unconfirmed)
Iwamoto, Takahiro https://orcid.org/0000-0002-2349-0714 (unconfirmed)
Gower, Nicholas J.
Nakamura, Masaharu https://orcid.org/0000-0002-1419-2117 (unconfirmed)
|Author's alias:||高谷, 光|
|Publisher:||Chemical Society of Japan|
|Journal title:||Bulletin of the Chemical Society of Japan|
|Abstract:||Solution-phase synchrotron X-ray absorption spectroscopy (XAS) is a powerful tool for structural and mechanistic investigations of paramagnetic organoiron intermediates in solution-phase reactions. For paramagnetic organotransition metal intermediates, difficulties are often encountered with conventional NMR- and EPR-based analyses. By using solution-phase XAS, we succeeded in identifying the organoiron species formed in the reaction of iron bisphosphine with mesitylmagnesium bromide, MesMgBr, and 1-bromodecane in a [FeX2(SciOPP)]-catalyzed Kumada–Tamao–Corriu (KTC)-type cross-coupling reaction. X-ray absorption near-edge structure (XANES) spectra showed that the resulting aryliron species possessed a divalent oxidation state. Extended X-ray absorption fine structure (EXAFS) demonstrated that the solution-phase molecular geometries of these species are in satisfactory agreement with the crystallographic geometries of [FeIIBrMes(SciOPP)] and [FeIIMes2(SciOPP)]. By combining GC-quantitative analysis and solution-phase XAS, the cross-coupling reactivities of these aryliron species were successfully investigated in the reaction with 1-bromodecane under stoichiometric and catalytic conditions.|
|Description:||放射光施設SPring-8で鉄触媒の作用を直接観察. 京都大学プレスリリース. 2015-03-16.|
|Rights:||© 2015 The Chemical Society of Japan.|
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|Appears in Collections:||Journal Articles|
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