NHC‐Coordinated Diphosphene‐Stabilized Gold(I) Hydride and Its Reversible Conversion to Gold(I) Formate with CO2. (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. Volume 131:Number 43(2019)
• Page Start: 15511
• Page End: 15515
• Publication Date: 2019-09-12
• Subjects: Diphosphen -- Gold -- Kohlendioxid -- Ligandendesign -- Phosphor; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201909798
• Languages: English
• ISSNs: 0044-8249

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‐koordiniertes Diphosphen wurde als Ligand für die Isolierung von monomerem Gold(I)‐hydrid verwendet, das durch Hydroaurierung von CO2 oder dehydrierende Kupplung mit Ameisensäure glatt das Au I ‐Formiat bildet. Dieses setzt bei Raumtemperatur unter Vakuum CO2 frei, was bei niedrigeren Temperaturen mithilfe eines N‐heterocyclischen Carbens (NHC) beschleunigt werden kann.