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Synthesis of a Trigold Monocation: An Isolobal Analogue of [H3]+


  • We thank the Georgia Institute of Technology and the U.S. National Science Foundation (CHE-1057659 to T.G.G.) for support. We thank Prof. Dr. Jake Soper and Michael Bayless (GATech) for the use of their potentiostat and for invaluable help with electrochemical measurements; Prof. Dr. Seth Marder and his group kindly allowed us the use of their infrared spectrometer.


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Isolobal and isolatable: A triangular [L3Au3]+ ion, bearing N-heterocyclic carbene ligands (L), is crystallographically characterized (see structure; Au yellow, C gray, N blue). Density functional theory suggests full valence delocalization among the gold atoms, with the HOMO composed largely of gold 6s orbitals and the LUMO comprising a degenerate pair. This orbital picture is analogous to that of [H3]+.

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