Fig. 4. ORTEP-3 diagram of the molecular structure of the anion in (10) displaying 50% probability ellipsoids. H atoms have been removed for clarity. Selected bond-lengths (Å) and angles (°): N1–U1 2.063(5), U2–N1 2.066(5), Ct(COT)–U1 2.033(4), Ct(Cp*)–U1 2.516(2), Ct(COT)–U2 2.038(4), Ct(Cp*)–U2 2.536(2); U1–N1–U2 159.4(3), Ct(COT)–U1–Ct(Cp*) 137.03(2), Ct(COT)–U2–Ct(Cp*) 136.70(2), Ct(COT)–U1–N1 122.83(8), Ct(Cp*)–U1–N1 100.09(1), Ct(COT)–U2–N1 122.75(3), Ct(Cp*)–U2–N1 100.54(2).