Reactivity of NHC/diphosphene-coordinated Au(i)-hydride
2021
Dhara, Debabrata | Scheschkewitz, David | Chandrasekhar, Vadapalli | Yildiz, Cem B. | Jana, Anukul
We report the reactivity of isolable Au(i)-hydride stabilized by an NHC-coordinated diphosphene towards substrates containing C–C and N–N multiple bonds (NHC = N-heterocyclcic carbene). Reactions with dimethyl acetylenedicarboxylate and azobenzene lead to a trans-addition of the Au(i)-H across the C–C triple bond and the N–N double bond, respectively. In contrast, the reaction with ethyl diazoacetate affords a gold(i)-hydrazonide as the 1,1-addition product to the terminal nitrogen atom. With phenyl acetylene, the corresponding Au(i)-alkynyl complex is obtained under the elimination of dihydrogen. Strikingly, diphosphene-containing Au(i)-hydride is more reactive – affording different products in some cases – than a related NHC-stabilized Au(i)-hydride without the mediating diphosphene moiety.
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