ऑरोफिलिसिटी

thumb|When the ligand on the left is treated with 3 equivalents of a gold(I) halide (with each [[phosphine group coordinating a separate gold center), the aurophilic interaction between gold atoms hinders free rotation around single bonds. The temperature required to restore free rotation on the NMR timescale is a measure of the strength of the aurophilic interaction.]]