Table 13. Cationic noble gas compounds with weakly coordinating anions.
| Cation | Anion | Class. a | Synthesis | Comment | Ref. |
| Homopolyatomic cations | |||||
| [Xe2]+ | [Sb4F21]– | Lewis | [XeF]+/Xe + SbF5 | First homopoly-atomic cation | 27 |
| [Xe4]+ | [Sb x F5x+1]– | Lewis | [XeF]+[Sb2F11]–, SbF5 + Xe | No X-ray | 696 |
| Metal–nonmetal-cluster complexes | |||||
| [AuXe4]2+ | [Sb2F11]– | Lewis, Com | AuF3, Xe in HF/SbF5 | First xenon metal complex, gold(ii) 2 modifications: triclinic and tetragonal | 695 and 697 |
| [trans-AuXe2]2+ | [SbF6]– | Com | HAuCl4, XeF2, Xe in HF/SbF5 | Gold(ii) | 695 |
| [cis-AuXe2]2+ | [Sb2F11]– | Com | [AuXe4]2+([Sb2F11]–)2–Xe at RT | Gold(ii) | 695 |
| [trans-AuXe2F]2+ | [SbF6]– + [Sb2F11]– | Com | Au, XeF2, Xe in HF/SbF5 | Gold(iii) | 695 |
| [Au2Xe2F]3+ | [SbF6]– | Com | Au, XeF2, Xe in HF/SbF5 | Gold(ii) | 695 |
| [(F3As)AuXe]+ | [Sb2F11]– | Com | AuF3, Xe, AsF3 in HF/SbF5 | 698 | |
| [HgXe]2+ | [SbF6]– + [Sb2F11]– | Com | HgF2, Xe in HF/SbF5 | 698 | |
| Oxidation state +II | |||||
| [KrF]+ | [MF6]– (M = As, Sb, Bi) | Lewis | KrF2 + MF5 | First krypton cation | 699 |
| [KrF]+ | [AuF6]– | Lewis | KrF2 + Au | 682 | |
| [Kr2F3]+·KrF2, [Kr2F3]+·1/2KrF2, [Kr2F3]+·[KrF]+ | [SbF6]–[SbF6]–[AsF6]– | Lewis | KrF2 + MF5 | 699 | |
| [XeF]+ | [Sb2F11]– | Lewis | XeF2 + 2SbF5 | 687 | |
| [XeF]+ | [RuF6]– | Lewis | XeF2 + RuF5 | 700 | |
| [XeF]+ | [AsF6]– | Lewis | XeF2 + AsF5 | 701 | |
| [XeF]+ | [N(SO2F)2]– | Lewis | XeF2 + HN(SO2F)2 | First Xe–N bond, strong interaction with the anion | 702 |
| [XeF]+·HF | [Sb2F11]– | Lewis | XeF2 + 2SbF5 | 27 | |
| [XeF]+ | [X]– = [AsF6]–, [SbF6]–, [Sb2F11]–, [BiF6]–, [Bi2F11]– | Lewis | XeF2 + AsF5, SbF5, BiF5 | Better structures for [XeF]+[X]–: [X]– = [MF6]–, [SbF6]–, [Sb2F11]– | 691 |
| [Xe2F3]+ | [AsF6]– | Lewis | 2XeF2 + AsF5 | Monoclinic structure | 703 and 704 |
| [Xe2F3]+ | [AuF6]– | Lewis | XeF2 + AuF5 | 686 | |
| [Xe2F3]+ | [MF6]– (M = As, Sb) | Com | [XeF]+ as starting material | [Xe2F3]+[AsF6]– trigonal structure | 705 |
| [Xe(N(SO2F)2)]+ | [Sb3F16]– | Lewis | 3 step synthesis with AsF5 and SbF5 | 706 | |
| [XeC6F5]+ | [(F5C6)2BF2]– | Lewis | XeF2 + B(C6F5)3 | First Xe–C bond | 693 |
| [(MeCN)XeC6F5]+[XeC6F5]+ | [BX]– (X = CF3, C6F5) [BX]– (X = CF3, CN) | Lewis, Com | XeF2 + C6F5BF2 | Salt metatheses with [XeC6F5]+[BF4]– | 707 |
| [(C6F5Xe)2Cl]+ | [AsF6]– | Other | [XeC6F5]+ + TMSCl | First Xe–Cl bond | 708 |
| [XeOChF5]+ (Ch = Se, Te) | [AsF6]– | Lewis | FXeOChF5 + AsF5 | First Xe–O bond | 709 |
| [XeOTeF5]+·SO2ClF | [Sb(OTeF5)6]– | Other | Xe(OTeF5)2 + Sb(OTeF3)3 | OTeF5 – abstraction | 710 |
| [XeCl]+ | [Sb2F11]– | Other | [XeF]+ + [Cl]– | Ligand exchange | 711 |
| [XeN(H)TeF5]+ | [AsF6]– | Lewis | [F5TeNH3]+[AsF6]– + XeF2 | First Xe–N(sp3) bond | 712 |
| [(F3SN)XeF]+ | [AsF6]– | Com | F3SN + [XeF]+ | First Xe–N(sp) bond | 713 |
| [XeNSF4]+ | [AsF6]– | Other | In solid state and HF/BrF5 solution | Rearrangement of [F3SNXeF]+[AsF6]– | 714 |
| [(F3SN)XeNSF4]+ | [AsF6]– | Com | [F3SNXeF]+ + F3SN | 715 | |
| [Xe3OF3]+ | [MF6]– (M = As, Sb) | Other | H2O + XeF2/[XeF]+ | Hydrolysis to XeFOH followed by a reaction with [Xe2F3]+ | 716 |
| Oxidation state +IV | |||||
| [XeF3]+ | [Sb2F11]– | Lewis | XeF4 + 2SbF5 | 717 | |
| [XeF3]+ | [BiF6]– | Lewis | XeF4 + BiF5 | 718 | |
| [XeF3]+ | [Sb2F11]– | Lewis | XeF4 + SbF5 | Better structure | 691 |
| [XeF3]+·HF [H5F4]+·2([XeF3]+·HF) [XeF3]+ | [Sb2F11]–[SbF6]·2[Sb2F11]–[SbF6]– | Lewis | XeOF2·xHF + HF/SbF5 | 719 | |
| Oxidation state +VI | |||||
| [XeF5]+ | [PtF6]– | Lewis | XeF6 + PtF5 | First xenon cation structure | 688 and 689 |
| [XeF5]+ | [AsF6]– | Lewis | XeF6 + AsF5 | 704 | |
| [XeF5]+ | [SbF6]– | Ox | [XeF]+[SbF6]– + F2 in aHF | 692 | |
| [XeF5]+ | [Sb2F11]– | Other | [XeF5]+[SbF6]– | Crystals from a O2SbF6/XeF5SbF6 mixture | 692 |
| [XeF5]+ | [RuF6]– | Lewis | XeF6 + RuF5 | 700 | |
| [XeF5]+ | [PdF6]2– | Lewis | 2XeF6 + PdF4 | 720 | |
| [XeF5]+ | [Ti4F19]3– | Lewis | XeF6 + TiF4 | XeF6 from XeF2, F2 and UV radiation | 721 |
| [XeF5]+ | [m-F(OsO3F2)2]–[OsO3F2]– | Lewis | XeF6 + (OsO3F2)∞ | 690 | |
| [XeF5]+ | [Cu(SbF6)3]– | Other | [XeF5]+[SbF6]– + Cu+[SbF6]– in aHF | Anion exchange | 43 |
| [XeF5]+ | [AgF4]– | Lewis | AgF2 + KrF2 + XeF6 in aHF | 722 | |
| [XeF5]+ | [AuF4]– | Lewis | XeF6 + BrF3 AuF3 | 722 | |
| [XeF5]+·XeF2·[XeF5]+·2XeF2 [XeF5]+·1/2XeF2 | [AsF6]–[AsF6]–[AsF6]– | Com | XeF2 + [XeF5]+[AsF6]– | 723 | |
| [XeF5]+·XeOF4 | [SbF6]– | Lewis | XeF6 + [H3O]+[SbF6]– | 694 | |
| [XeF5]+·NO2 + | [SbF6]– | Other | [XeF5]+[SbF6]– + [NO2]+[SbF6]– | 43 | |
| [Xe2F11]+ | [AuF6]– | Lewis | 2XeF6 + AuF5 | 724 | |
| [Xe2F11]+ | [OsO3F2]– | Lewis | XeF6 + (OsO3F2)∞ | 690 | |
| [XeO2F]+[F(XeO2F)2]+ | [MF6]– (M = As, Sb) [AsF6]– | Lewis | XeO2F2 + MF5 (M = As, Sb) | α- and β-modification of [XeO2F]+[SbF6]– | 694 |
a Classification according to the introduction (Table 2): Lewis = Lewis acid halogen bond heterolysis, Com = complexation reaction, other = all other reactions not classified.