triple onium ion has a charge of +3, and so on. Compounds of an onium cation and some other anion are known as onium compounds or onium salts. Onium ions and...

The nitronium ion, [NO2]+, is a cation. It is an onium ion because its nitrogen atom has +1 charge, similar to ammonium ion [NH4]+. It is created by the...

Acylium ion, a type of oxonium ion with the structure R–C≡O+ Onium ion, a +1 cation derived by protonation of a hydride (includes oxonium ions) Pyrylium...

A halonium ion is any onium ion containing a halogen atom carrying a positive charge. This cation has the general structure R−+X−R′ where X is any halogen...

given, as the number of polyatomic ions encountered in practice is very large. Monatomic ion Protonation Onium ion Petrucci, Ralph H.; Herring, F. Geoffrey;...

An onium (plural: onia) is a bound state of a particle and its antiparticle. These states are usually named by adding the suffix -onium to the name of...

molecules More carbonium ions called non-classical ions are found in certain norbornyl systems Onium compounds Carbenium ion George Andrew Olah (1972)...

C8H8N+, and forms chemical compounds in combination with anions. It is an onium ion derived from its parent compound, indole, by the addition of a proton...

kryptonium ion, KrH+, is an onium ion, consisting of protonated krypton. Kryptonium is known in dilute gas phase. Although salts of the fluorokryptonium ion, KrF+...

of protolytic solvents. Lyate ion, a deprotonated solvent molecule Onium ion, a protonated molecule more generally Ion transport number Ionic atmosphere...

Geological Survey. Retrieved 9 November 2021. "Table 17 Mononuclear parent onium ions". IUPAC. Tang, Jian; Oka, Takeshi (1999). "Infrared spectroscopy of H3O+:...

atom, such as a quaternary ammonium or phosphonium cation (generally: onium ions), and with a negatively charged functional group, such as a carboxylate...

+1 electric charge. It is a superacid and one of the onium ions, indeed the simplest carbonium ion. It is highly unstable and highly reactive even upon...

higher oxidation states. Ate complexes are a counterpart to onium ions. Lewis acids form ate ions when the central atom reacts with a donor (2 e− X-type ligand)...

compound Onium ion Quaternary phase IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "Onium compounds"...

counter ion. It is thought that the acidic proton generated is what ultimately initiates the polymerization. Since their discovery in the 1970s aryl onium salts...

the appropriate length and with two methonium, heads have small trimethyl onium heads and flexible links. They all exhibit a depolarizing block. Aminosteroids...

system. The monomers can be activated by Bronsted acids, carbenium ions, onium ions, and metal cations. CROP can be a living polymerization and can be...

electrophilic attack of H+ or R+ on an alkane, in analogy to other main group onium species, while a carbocation that contains any type of three-centered bonding...

The xenonium ion, XeH+, is an onium compound, consisting of protonated xenon. Although the existence of the xenonium salts has not been proven, the isolated...

purple Ph5Bi was the first to be synthesized so. Bi(V) easily forms an onium ion for example by protonation with p-toluenesulfonic acid: Ph5Bi + HO3SAr...

perchlorate. The proposed reaction pathway includes onium ion formation with the following perchlorate ion addition. The “doping effect” can also be observed...

known as mustards.[citation needed] Such compounds can form cyclic "onium" ions (sulfonium, ammonium, etc.) that are good alkylating agents. Other such...

George A.; Donovan, Daniel J.; Shen, Jacob; Klopman, Gilles (1975). "Onium ions. XVI. Hydrogen-deuterium exchange accompanying the cleavage of ammonium...

The ammonium cation is a positively charged polyatomic ion with the chemical formula NH+4 or [NH4]+. It is formed by the protonation of ammonia (NH3)...

Reactions with soft electrophiles (e.g. Br+) deliver positively charged onium ions 13. Transition-metal-catalysed reactions proceed via allylic intermediates...

In organic chemistry, a sulfonium ion, also known as sulphonium ion or sulfanium ion, is a positively-charged ion (a "cation") featuring three organic...

characteristics of molten salts derived from trimethylsulfonium bromide". Canadian Journal of Chemistry. 73 (4): 593–598. doi:10.1139/v95-076. Onium compounds...

THE PHYSIOLOGICAL ACTIVITY OF CERTAIN -ONIUM COMPOUNDS. THE MOBILITIES OF THE -ONIUM IONS. I. SULFONIUM IONS." J. Am. Chem. Soc., 1925, 47 (7), pp 1904–1916...

afford methyl halides: ROCH3 + HBr → CH3Br + ROH These reactions proceed via onium intermediates, i.e. [RO(H)CH3]+Br−. Some ethers undergo rapid cleavage with...