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Ambireactive (R₃P)₂BH₂ Groups Facilitating Temperature‐Switchable Bond Activation by an Iron Complex

Publisher： John Wiley & Sons Inc

E-ISSN： 1521-3765|24|6|1358-1364

ISSN： 0947-6539

Source： CHEMISTRY - A EUROPEAN JOURNAL, Vol.24, Iss.6, 2018-01, pp. : 1358-1364

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

AbstractAn iron pincer complex containing a hemi‐labile (R₃P)₂BH₂ group exhibits temperature‐switchable reactivity patterns: a reversible B−H activation concomitant with a P−B bond cleavage is observed at room temperature. Below 4 °C, intra‐ and intermolecular C−H activation pathways are becoming faster and more dominant. Mechanistic investigations reveal that the lability of the (R₃P)₂BH₂ group in combination with the exothermic formation of σ‐bonded complexes are responsible for the switchable bond activation. Finally, a protocol for an iron‐catalyzed H/D‐exchange of organic solvents in the absence of oxidants has been developed.

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