Dialkylbiphenylphosphane-Au^I complexes exhibit only weak metal-arene interactions with the covering arene ring. However, the contacts in isoleptic Ag^I and Cu^I complexes are shorter than the limiting values of 3.03 Å (AgI) and 2.83 Å (Cu^I). Strong metal-arene interactions were also found in the two AgI aquo complexes and in two acetonitrile—Cu^I complexes with dialkylbiphenylphosphane ligands. Arene-Ag^I complexes with these bulky phosphane ligands show the strongest Ag^I—arene bonds known.

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