Noble-Gas Chemistry More than Half a Century after the First Report of the Noble-Gas Compound

摘要

Recent development in the synthesis and characterization of noble-gas compounds is reviewed, i.e., noble-gas chemistry reported in the last five years with emphasis on the publications issued after 2017. XeF is commercially available and has a wider practical application both in the laboratory use and in the industry. As a ligand it can coordinate to metal centers resulting in [M(XeF ) ] salts. With strong Lewis acids, XeF acts as a fluoride ion donor forming [XeF] or [Xe F ] salts. Latest examples are [Xe F ][RuF ]·XeF , [Xe F ][RuF ] and [Xe F ][IrF ]. Adducts NgF ·CrOF and NgF ·2CrOF (Ng = Xe, Kr) were synthesized and structurally characterized at low temperatures. The geometry of XeF was studied in solid argon and neon matrices. Xenon hexafluoride is a well-known fluoride ion donor forming various [XeF ] and [Xe F ] salts. A large number of crystal structures of previously known or new [XeF ] and [Xe F ] salts were reported, i.e., [Xe F ][SbF ], [XeF ][SbF ], [XeF ][Sb F ], [XeF ][BF ], [XeF ][TiF ], [XeF ] [Ti F ], [XeF ][Ti F ], [XeF ] [MnF ], [XeF ][MnF ], [XeF ] [Mn F ], [Xe F ] [SnF ], [Xe F ] [PbF ], [XeF ] [Sn F ], [XeF ][Xe F ][Cr OF ]·2Cr OF , [XeF ] [Cr F ]·2Cr OF , [Xe F ] [Cr F ], [XeF ] [Cr O F ], [XeF ] [Cr O F ]·2HF, [XeF ] [Cr O F ]·2XeOF , A[XeF ][SbF ] (A = Rb, Cs), Cs[XeF ][Bi Sb F ] (x = ~0.37–0.39), NO XeF (SbF ) , XeF M(SbF ) (M = Ni, Mg, Zn, Co, Cu, Mn and Pd) and (XeF ) [Hg(HF)] (SbF ) . Despite its extreme sensitivity, many new XeO adducts were synthesized, i.e., the 15-crown adduct of XeO , adducts of XeO with triphenylphosphine oxide, dimethylsulfoxide and pyridine-N-oxide, and adducts between XeO and N-bases (pyridine and 4-dimethylaminopyridine). [Hg(KrF ) ][AsF ] ·2HF is a new example of a compound in which KrF serves as a ligand. Numerous new charged species of noble gases were reported (ArCH , ArOH , [ArB O ] , [ArB O ] , [ArB O ] , [ArB O ] , [B (CN) Ne] ). Molecular ion HeH was finally detected in interstellar space. The discoveries of Na He and ArNi at high pressure were reported. Bonding motifs in noble-gas compounds are briefly commented on in the last paragraph of this review.