NHC‐Coordinated Diphosphene‐Stabilized Gold(I) Hydride and Its Reversible Conversion to Gold(I) Formate with CO2. Issue 43 (12th September 2019)

• Record Type: Journal Article
• Authors: Dhara, Debabrata; Das, Shubhajit; Pati, Swapan K.; Scheschkewitz, David; Chandrasekhar, Vadapalli; Jana, Anukul
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 43(2019)
• Page Start: 15367
• Page End: 15371
• Publication Date: 2019-09-12
• Subjects: carbon dioxide -- diphosphene -- gold -- ligand design -- phosphorus; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201909798
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: An NHC‐coordinated diphosphene is employed as ligand for the synthesis of a hydrocarbon‐soluble monomeric Au I hydride, which readily adds CO2 at room temperature yielding the corresponding Au I formate. The reversible reaction can be expedited by the addition of NHC, which induces β‐hydride shift and the removal of CO2 from equilibrium through the formation of an NHC‐CO2 adduct. The Au I formate is alternatively formed by dehydrogenative coupling of the Au I hydride with formic acid (HCO2 H), thus in total establishing a reaction sequence for the Au I hydride mediated dehydrogenation of HCO2 H as chemical hydrogen storage material. Abstract : NHC‐coordinated diphosphene has been used as a ligand for the isolation of monomeric gold(I) hydride, which readily converted into the corresponding Au I formate either by hydroauration of CO2 or by dehydrogenative coupling with formic acid. The Au I formate in turn loses CO2 at room temperature upon application of vacuum and this process can be expedited at lower temperatures by using NHC.