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. XeF2 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(XeF2)x]n+ salts. With strong Lewis acids, XeF2 acts as a fluoride ion donor forming [XeF]+ or [Xe2F3]+ salts. Latest examples are [Xe2F3][RuF6]·XeF2, [Xe2F3][RuF6] and [Xe2F3][IrF6]. Adducts NgF2·CrOF4 and NgF2·2CrOF4 (Ng = Xe, Kr) were synthesized and structurally characterized at low temperatures. The geometry of XeF6 was studied in solid argon and neon matrices. Xenon hexafluoride is a well-known fluoride ion donor forming various [XeF5]+ and [Xe2F11]+ salts. A large number of crystal structures of previously known or new [XeF5]+ and [Xe2F11]+ salts were reported, i.e., [Xe2F11][SbF6], [XeF5][SbF6], [XeF5][Sb2F11], [XeF5][BF4], [XeF5][TiF5], [XeF5]5[Ti10F45], [XeF5][Ti3F13], [XeF5]2[MnF6], [XeF5][MnF5], [XeF5]4[Mn8F36], [Xe2F11]2[SnF6], [Xe2F11]2[PbF6], [XeF5]4[Sn5F24], [XeF5][Xe2F11][CrVOF5]·2CrVIOF4, [XeF5]2[CrIVF6]·2CrVIOF4, [Xe2F11]2[CrIVF6], [XeF5]2[CrV2O2F8], [XeF5]2[CrV2O2F8]·2HF, [XeF5]2[CrV2O2F8]·2XeOF4, A[XeF5][SbF6]2 (A = Rb, Cs), Cs[XeF5][BixSb1-xF6]2 (x = ~0.37–0.39), NO2XeF5(SbF6)2, XeF5M(SbF6)3 (M = Ni, Mg, Zn, Co, Cu, Mn and Pd) and (XeF5)3[Hg(HF)]2(SbF6)7. Despite its extreme sensitivity, many new XeO3 adducts were synthesized, i.e., the 15-crown adduct of XeO3, adducts of XeO3 with triphenylphosphine oxide, dimethylsulfoxide and pyridine-N-oxide, and adducts between XeO3 and N-bases (pyridine and 4-dimethylaminopyridine). [Hg(KrF2)8][AsF6]2·2HF is a new example of a compound in which KrF2 serves as a ligand. Numerous new charged species of noble gases were reported (ArCH2+, ArOH+, [ArB3O4]+, [ArB3O5]+, [ArB4O6]+, [ArB5O7]+, [B12(CN)11Ne]−). Molecular ion HeH+ was finally detected in interstellar space. The discoveries of Na2He and ArNi at high pressure were reported. Bonding motifs in noble-gas compounds are briefly commented on in the last paragraph of this review.

中文翻译：

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稀有气体化合物首次报道半个多世纪后的稀有气体化学


综述了稀有气体化合物的合成和表征的最新进展，即近五年来报道的稀有气体化学，重点是2017年以后发表的出版物。XeF2已商业化，并且在实验室中具有更广泛的实际应用使用和工业中。作为配体，它可以与金属中心配位，形成 [M(XeF2)x]n+ 盐。在强路易斯酸作用下，XeF2 充当氟离子供体，形成 [XeF]+ 或 [Xe2F3]+ 盐。最新的例子是[Xe2F3][RuF6]·XeF2、[Xe2F3][RuF6]和[Xe2F3][IrF6]。在低温下合成了加合物 NgF2·CrOF4 和 NgF2·2CrOF4 (Ng = Xe, Kr) 并进行了结构表征。在固体氩和氖矩阵中研究了 XeF6 的几何形状。六氟化氙是一种众所周知的氟离子供体，可形成各种 [XeF5]+ 和 [Xe2F11]+ 盐。报道了大量先前已知或新的[XeF5]+和[Xe2F11]+盐的晶体结构，即[Xe2F11][SbF6]、[XeF5][SbF6]、[XeF5][Sb2F11]、[XeF5] [BF4]、[XeF5][TiF5]、[XeF5]5[Ti10F45]、[XeF5][Ti3F13]、[XeF5]2[MnF6]、[XeF5][MnF5]、[XeF5]4[Mn8F36]、[ Xe2F11]2[SnF6]、[Xe2F11]2[PbF6]、[XeF5]4[Sn5F24]、[XeF5][Xe2F11][CrVOF5]·2CrVIOF4、[XeF5]2[CrIVF6]·2CrVIOF4、[Xe2F11]2[ CrIVF6]、[XeF5]2[CrV2O2F8]、[XeF5]2[CrV2O2F8]·2HF、[XeF5]2[CrV2O2F8]·2XeOF4、A[XeF5][SbF6]2（A = Rb、Cs）、Cs[XeF5 ][BixSb1-xF6]2 (x = ~0.37–0.39)、NO2XeF5(SbF6)2、XeF5M(SbF6)3（M = Ni、Mg、Zn、Co、Cu、Mn 和 Pd）和 (XeF5)3[ Hg(HF)]2(SbF6)7。尽管XeO3具有极高的灵敏度，但仍合成了许多新的XeO3加合物，即XeO3的15冠加合物，XeO3与三苯基膦氧化物、二甲基亚砜和吡啶-N-氧化物的加合物，以及XeO3与N-碱（吡啶和4-碱）之间的加合物。二甲氨基吡啶）。 [Hg(KrF2)8][AsF6]2·2HF是KrF2作为配体的化合物的新例子。报道了许多新的惰性气体带电物质（ArCH2+、ArOH+、[ArB3O4]+、[ArB3O5]+、[ArB4O6]+、[ArB5O7]+、[B12(CN)11Ne]−）。分子离子HeH+终于在星际空间中被探测到。报道了高压下发现的Na2He和ArNi。本综述的最后一段简要评论了惰性气体化合物中的键合基序。