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Copper-Ligand Cooperativity in H$_2$ Activation Enables the Synthesis of Copper Hydride Complexes

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Abstract

Copper(I) complexes of a new participative triphosphane ligand (2 H) have been prepared and structurally characterized, in particular [Cu(2 H)I] and [Cu(2)]2. Hydrogenation of the latter species afforded the trimetallic hydride species [Cu3(2)2(µ-H)] or in the presence of BEt3, [Cu(2 H)(HBEt3)]. Their formation evidences transient formation of [Cu(2 H)H] formed by hydrogenolysis of the Cu-N bond of [Cu(2)]2. [Cu(2 H)(HBEt3)] behaves like a hydride complex and inserts CO2 to yield the formate product [Cu(2 H)(O2CH)]. QTAIM analysis of the Cu-H-BEt3 interaction indicates a hydride complex stabilized by the Lewis acid BEt3.
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cea-03132894 , version 1 (05-02-2021)

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Alicia Aloisi, Étienne Crochet, Emmanuel Nicolas, Jean-Claude Berthet, Camille Lescot, et al.. Copper-Ligand Cooperativity in H$_2$ Activation Enables the Synthesis of Copper Hydride Complexes. 2021. ⟨cea-03132894⟩
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