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NHC-Coordinated Diphosphene-Stabilized Gold(I) Hydride and Its Reversible Conversion to Gold(I) Formate with CO2.


ABSTRACT: An NHC-coordinated diphosphene is employed as ligand for the synthesis of a hydrocarbon-soluble monomeric AuI hydride, which readily adds CO2 at room temperature yielding the corresponding AuI formate. The reversible reaction can be expedited by the addition of NHC, which induces ?-hydride shift and the removal of CO2 from equilibrium through the formation of an NHC-CO2 adduct. The AuI formate is alternatively formed by dehydrogenative coupling of the AuI hydride with formic acid (HCO2 H), thus in total establishing a reaction sequence for the AuI hydride mediated dehydrogenation of HCO2 H as chemical hydrogen storage material.

SUBMITTER: Dhara D 

PROVIDER: S-EPMC6916326 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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NHC-Coordinated Diphosphene-Stabilized Gold(I) Hydride and Its Reversible Conversion to Gold(I) Formate with CO<sub>2</sub>.

Dhara Debabrata D   Das Shubhajit S   Pati Swapan K SK   Scheschkewitz David D   Chandrasekhar Vadapalli V   Jana Anukul A  

Angewandte Chemie (International ed. in English) 20190912 43


An NHC-coordinated diphosphene is employed as ligand for the synthesis of a hydrocarbon-soluble monomeric Au<sup>I</sup> hydride, which readily adds CO<sub>2</sub> at room temperature yielding the corresponding Au<sup>I</sup> formate. The reversible reaction can be expedited by the addition of NHC, which induces β-hydride shift and the removal of CO<sub>2</sub> from equilibrium through the formation of an NHC-CO<sub>2</sub> adduct. The Au<sup>I</sup> formate is alternatively formed by dehydrogen  ...[more]

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