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A Boron-Transfer Mechanism Mediating the Thermally Induced Revival of Frustrated Carbene−Borane Pairs from their Shelf-Stable Adducts

preprint
submitted on 22.04.2021, 02:11 and posted on 22.04.2021, 13:14 by Yoichi Hoshimoto, Mahiro Sakuraba, Takuya Kinoshita, Masaki Ohbo, Manussada Ratanasak, Jun-ya Hasegawa, Sensuke Ogoshi
Combined experimental and theoretical studies allowed clarifying the reaction mechanism for the revival of frustrated carbene−borane pairs from external-stimuli-responsive classical Lewis adducts comprised of N-phosphine oxide-substituted imidazolylidenes and triarylboranes. A borane-transfer process from the carbene carbon atom to the N-phosphinoyl oxygen atom was identified as the rate-determining event for the regeneration of the FLP species, eventually enabling the heterolytic cleavage of H2.

Funding

JSPS KAKENHI JP15K17824

JSPS KAKENHI JP18K14219

JSPS KAKENHI JP15H00943

JSPS KAKENHI JP15H05803

JSPS KAKENHI JP15H05805

History

Email Address of Submitting Author

hoshimoto@chem.eng.osaka-u.ac.jp

Institution

Faculty of Engineering, Osaka University

Country

Japan

ORCID For Submitting Author

0000-0003-0882-6109

Declaration of Conflict of Interest

no conflict of interest

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