 2 , and is remarkable in having direct chemical bonds between two notoriously unreactive atoms , xenon and gold , with xenon acting as a transition metal ligand . 
 2 , and <a href='drop_aux' title='1'><mark>is</mark></a>remarkable in having direct chemical bonds between two notoriously unreactive atoms , xenon and gold , with xenon acting as a transition metal ligand . 
2 , and remarkable in havin direct chemical bonds between two notoriously unreactive atoms , xenon and gold , w/ xenon acting as a transition metal ligand .