Cesium or tetraethylammonium saltsof the doubly negatively chargedmercury(II) complexes [Hg(12-I-closo-1-CB11H10)2]2–(1),[Hg(12-HC C-closo-1-CB11H10)2]2–(2), [Hg(12-FcC C-closo-1-CB11H10)2]2–(3), and [Hg(12-iPr3SiC C-closo-1-CB11H10)2]2–(4) weresynthesized. ...