The first gold(I) complexes of simple arenes show a separation between the Au center and the mean aromatic plane of 2.20-2.24 Å, which is much shorter than the related silver(I)-arene bonds.
Cationic η1/η2-Gold(I) Complexes of Simple Arenes
Angew. Chem. Int. Ed. 2006, 45, 5455-5459.