Dr. Thomas J. Robilotto, Dr. John Bacsa, Prof. Dr. Thomas G. Gray and Prof. Dr. Joseph P. Sadighi Synthesis of a Trigold Monocation: An Isolobal Analogue of [H3]+ Angewandte Chemie International Edition 51
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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