In chemistry, noble gas compounds are chemical compounds that include an element from the noble gases, group 18 of the periodic table. Although the noble gases are generally unreactive elements, many such compounds have been observed, particularly involving the element xenon.
From the standpoint of chemistry, the noble gases may be divided into two groups:[citation needed] the relatively reactive krypton (ionisation energy 14.0 eV), xenon (12.1 eV), and radon (10.7 eV) on one side, and the very unreactive argon (15.8 eV), neon (21.6 eV), and helium (24.6 eV) on the other. Consistent with this classification, Kr, Xe, and Rn form compounds that can be isolated in bulk at or near standard temperature and pressure, whereas He, Ne, Ar have been observed to form true chemical bonds using spectroscopic techniques, but only when frozen into a noble gas matrix at temperatures of 40 K or lower, in supersonic jets of noble gas, or under extremely high pressures with metals.
The heavier noble gases have more electron shells than the lighter ones. Hence, the outermost electrons are subject to a shielding effect from the inner electrons that makes them more easily ionized, since they are less strongly attracted to the positively-charged nucleus. This results in an ionization energy low enough to form stable compounds with the most electronegative elements, fluorine and oxygen, and even with less electronegative elements such as nitrogen and carbon under certain circumstances.[1][2]
^Smith GL, Mercier HP, Schrobilgen GJ (February 2007). "Synthesis of [F3S≡NXeF][AsF6] and structural study by multi-NMR and Raman spectroscopy, electronic structure calculations, and X-ray crystallography". Inorganic Chemistry. 46 (4): 1369–78. doi:10.1021/ic061899+. PMID 17256847.
^Smith GL, Mercier HP, Schrobilgen GJ (May 2008). "F5SN(H)Xe+; a rare example of xenon bonded to sp3-hybridized nitrogen; synthesis and structural characterization of [F5SN(H)Xe][AsF6]". Inorganic Chemistry. 47 (10): 4173–84. doi:10.1021/ic702039f. PMID 18407626.
and 28 Related for: Noble gas compound information
reactions. Only a few hundred noblegascompounds are known to exist. For the same reason[clarification needed], noblegas atoms are small, and the only...
gases. This is a tendency, not a rule, as all noblegases and other "inert" gases can react to form compounds under some conditions. The inert gases are...
states. Until the 1960s no noblegascompounds had been synthesized. Following the first successful synthesis of xenon compounds in 1962, synthesis of krypton...
Neon compounds are chemical compounds containing the element neon (Ne) with other molecules or elements from the periodic table. Compounds of the noble gas...
J. (28 February 2002). "NobleGas–Actinide Compounds: Complexation of the CUO Molecule by Ar, Kr, and Xe Atoms in NobleGas Matrices". Science. 295 (5563):...
examples being especially numerous for transition metal complexes. The noblegascompound xenon tetrafluoride adopts this structure as predicted by VSEPR theory...
of individual atoms (e.g. a noblegas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety...
includes inorganic compounds formed with hydrogen, metals, nonmetals, and even noblegases; as well as a diverse set of organic compounds. For many elements...
Xenon hexafluoride is a noblegascompound with the formula XeF6. It is one of the three binary fluorides of xenon that have been studied experimentally...
−2 to +6. Sulfur forms stable compounds with all elements except the noblegases. Sulfur polycations, S82+, S42+ and S162+ are produced when sulfur is...
difluoride (RnF 2) is a compound of radon, a radioactive noblegas. Radon reacts readily with fluorine to form a solid compound, but this decomposes on...
reactions such as the formation of xenon hexafluoroplatinate, the first noblegascompound to be synthesized. Xenon is used in flash lamps and arc lamps, and...
displaying wikidata descriptions as a fallback Noblegascompound – Chemical compound containing a noblegas element Birks, J. B. (1975). "Excimers". Reports...
; Schrobilgen, G. J. (2018). "A Stable Crown-Ether Complex with a Noble-gasCompound". Angew. Chem. Int. Ed. 57 (38): 12448–12452. doi:10.1002/anie.201806640...
a noblegas configuration, or a full electron configuration. It is now known that most of these gases in fact do react to form chemical compounds, such...
smallest and the lightest noblegas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or...
xenon and platinum hexafluoride leading to the first synthesis of a noblegascompound, xenon hexafluoroplatinate (1962). Robert Burns Woodward announces...
as nitrogen (N2), the noblegases are called "elemental gases" to distinguish them from molecules that are also chemical compounds. The only possible motion...
Xenic acid is a proposed noblegascompound with the chemical formula H2XeO4 or XeO2(OH)2. It has not been isolated, and the published characterization...
plus gold. In addition to this term's function as a compound noun, there are circumstances where noble is used as an adjective for the noun metal. A galvanic...
1063/1.555614 Mazej Z 2020, "Noble-gas chemistry more than half a century after the first report of the noble-gascompound", Molecules, vol. 25, no. 13...
is a chemical compound of xenon and oxygen with molecular formula XeO4, remarkable for being a relatively stable compound of a noblegas. It is a yellow...
Radon compounds are chemical compounds formed by the element radon (Rn). Radon is a noblegas, i.e. a zero-valence element, and is chemically not very...
as a poison gas weapon. In the form of chloride ions, chlorine is necessary to all known species of life. Other types of chlorine compounds are rare in...
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