Category: Cations

A dication is any cation, of general formula X2+, formed by the removal of two electrons from a neutral species. Diatomic dications corresponding to stable neutral species (e.g. H2+2 formed by removal
Thiopyrylium is a cation with the chemical formula C5H5S+. It is analogous to the pyrylium cation with the oxygen atom replaced by a sulfur atom. Thiopyrylium salts are less reactive than the analogou
The fluoronium ion is an inorganic cation with the chemical formula H2F+. It is one of the cations found in fluoroantimonic acid. The structure of the salt with the Sb2F−11 anion, has been determined.
Chlormequat is an organic compound with the formula ClCH2CH2N(CH3)+3 that is used as a plant growth regulator. It is typically sold as the chloride salt, chlormequat chloride (C5H13Cl2N), a colorless
Halonium ion
A halonium ion is any onium ion containing a halogen atom carrying a positive charge. This cation has the general structure R−−R′ where X is any halogen and no restrictions on R, this structure can be
Dihydrogen cation
The dihydrogen cation or hydrogen molecular ion is a cation (positive ion) with formula H+2. It consists of two hydrogen nuclei (protons) sharing a single electron. It is the simplest molecular ion. T
Mercury polycations
Mercury polycations are polyatomic cations that contain only mercury atoms. The best known example is the Hg2+2 ion, found in mercury(I) (mercurous) compounds. The existence of the metal–metal bond in
Selenopyrylium is an aromatic heterocyclic compound consisting of a six-membered ring with five carbon atoms and a positively charged selenium atom.
In chemistry, chloryl refers to a triatomic cation with chemical formula ClO+2. This species has the same general structure as chlorite (ClO−2) but it is electronically different, with chlorine having
1-Methylnicotinamide (trigonellamide) is a prototypic organic cation. 1-Methylnicotinamide is the methylated amide of Nicotinamide (niacinamide, vitamin B3). 1-Methylnicotinamide is an endogenic subst
Uranium(IV) compounds
Uranous is the chemical term for the reduced tetrapositive cation of uranium that exhibits the valence U4+. It is one of the two common ionic states of uranium found in nature, the other being the oxi
Kryptonium ion
The kryptonium ion, KrH+, is a hypothetical onium ion, consisting of protonated krypton. Although salts of the fluorokryptonium ion, KrF+, are known to exist, the existence of the kryptonium cation it
The arsonium cation is a positively charged polyatomic ion with the chemical formula AsH+4. An arsonium salt is a salt containing either the arsonium (AsH+4) cation, such as arsonium bromide (AsH+4Br−
Hydrazinium is the cation with the formula [N2H5]+. This cation has a methylamine-like structure ([H2N−NH3]+). It can be derived from hydrazine by protonation (treatment with a strong acid). Hydrazini
Protonated hydrogen cyanide
HCNH+, also known as protonated hydrogen cyanide, is a molecular ion of astrophysical interest. It also exists in the condensed state when formed by superacids.
Trifluoromethyl cation
The trifluoromethyl cation is a molecular cation with a formula of CF+3. It is a carbocation due to its positively charged carbon atom. It is part of the family of carbenium ions, with three fluorine
In organic chemistry, a sulfonium ion, also known as sulphonium ion or sulfanium ion, is a positively-charged ion (a "cation") featuring three organic substituents attached to sulfur. These organosulf
Tetraxenonogold(II), gold tetraxenide(II) or AuXe2+4 is a cationic complex with a square planar configuration of atoms. It is found in the compound AuXe2+4(Sb2F−11)2, which exists in triclinic and tet
Dioxidanylium, which is protonated molecular oxygen, or just protonated oxygen, is an ion with formula HO+2.It is formed when hydrogen containing substances combust, and exists in the ionosphere, and
Phosphenium ions, not to be confused with phosphonium or phosphirenium, are divalent cations of phosphorus of the form [PR2]+. Phosphenium ions have long been proposed as reaction intermediates.
Onium ion
In chemistry, an onium ion is a cation formally obtained by the protonation of mononuclear parent hydride of a pnictogen (group 15 of the periodic table), chalcogen (group 16), or halogen (group 17).
Hydron (chemistry)
In chemistry, a hydron is the general name for a cationic form of atomic hydrogen, represented with the symbol H+. The term "hydron", endorsed by the IUPAC, includes cations of hydrogen regardless of
Tetrabutylammonium is a quaternary ammonium cation with the formula [N(C4H9)4]+. It is used in the research laboratory to prepare lipophilic salts of inorganic anions. Relative to tetraethylammonium d
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). Ammonium is also a general name for positively ch
Hydrogen ion cluster
A hydrogen molecular ion cluster or hydrogen cluster ion is a positively charged cluster of hydrogen molecules. The hydrogen molecular ion (H+2) and trihydrogen ion (H+3) are well defined molecular sp
Diazenylium is the chemical N2H+, an inorganic cation that was one of the first ions to be observed in interstellar clouds. Since then, it has been observed for in several different types of interstel
Hydrogen-bridged cations
Hydrogen-bridged cations are a type of charged species in which a hydrogen atom is simultaneously bonded to two atoms through partial sigma bonds. While best observable in the presence of superacids a
Lyonium ion
In chemistry, a lyonium ion is the cation derived by the protonation of a solvent molecule. For example, a hydronium ion is formed by the protonation of water, and CH3OH+2 is the cation formed by the
Trihydrogen cation
The trihydrogen cation or protonated molecular hydrogen is a cation (positive ion) with formula H+3, consisting of three hydrogen nuclei (protons) sharing two electrons. The trihydrogen cation is one
Silylium ion
A silylium ion is a reactive silyl-containing cation with the formula SiR+3. With three rather than the usual four bonds to Si, silylium ions are the silicon analogues of carbenium ions. They can be v
Ethylmercury (sometimes ethyl mercury) is a cation composed of an organic CH3CH2- species (an ethyl group) bound to a mercury(II) centre, making it a type of organometallic cation, and giving it a che
In chemistry, the pentazenium cation (also known as pentanitrogen) is a positively-charged polyatomic ion with the chemical formula N+5 and structure N−N−N−N−N. Together with solid nitrogen polymers a
No description available.
Decynium-22 is a cationic derivative of quinoline, and a potent inhibitor of the plasma membrane monoamine transporter (PMAT), as well as all members of the organic cation transporter (OCT) family in
A proton is a stable subatomic particle, symbol p, H+, or 1H+ with a positive electric charge of +1 e elementary charge. Its mass is slightly less than that of a neutron and 1,836 times the mass of an
Tetraethylammonium (TEA), (NEt+4) or (Et4N+) is a quaternary ammonium cation consisting of four ethyl groups attached to a central nitrogen atom, and is positively charged. It is a counterion used in
In organic chemistry, isothiouronium is a functional group with the formula [RSC(NH2)2]+ (R = alkyl, aryl) and is the acid salt of isothiourea. The H centres can also be replaced by alkyl and aryl. St
Tetramethylammonium (TMA) or (Me4N+) is the simplest quaternary ammonium cation, consisting of four methyl groups attached to a central nitrogen atom, and is isoelectronic with neopentane. It is posit
Phosphirenium ion
Phosphirenium ions (R1R2C2PY1Y+2) are a series of organophosphorus compounds containing unsaturated three-membered ring phosphorus (V) heterocycles and is believed to be present in such molecules. Man
Telluropyrylium is an aromatic heterocyclic compound consisting of a six member ring with five carbon atoms, and a positively charged tellurium atom. Derivatives of telluropyrylium are important in re
No description available.
Helium hydride ion
The helium hydride ion or hydridohelium(1+) ion or helonium is a cation (positively charged ion) with chemical formula HeH+. It consists of a helium atom bonded to a hydrogen atom, with one electron r
Cyclopropenium ion
The cyclopropenium ion is the cation with the formula C3H+3. It has attracted attention as the smallest example of an aromatic cation. Its salts have been isolated, and many derivatives have been char
The tetrafluoroammonium cation (also known as perfluoroammonium) is a positively charged polyatomic ion with chemical formula NF+4. It is equivalent to the ammonium ion where the hydrogen atoms surrou
Tropylium cation
In organic chemistry, the tropylium ion or cycloheptatrienyl cation is an aromatic species with a formula of [C7H7]+. Its name derives from the molecule tropine from which cycloheptatriene (tropyliden
S-Adenosylmethioninamine is a substrate that is required for the biosynthesis of polyamines including spermidine, spermine, and thermospermine. It is produced by decarboxylation of S-adenosyl methioni
In chemistry, the phosphonium (more obscurely: phosphinium) cation describes polyatomic cations with the chemical formula PR+4 (where R is a hydrogen or an alkyl, aryl, or halide group). These cations
Thiamine, also known as thiamin and vitamin B1, is a vitamin, an essential micronutrient, that cannot be made in the body. It is found in food and commercially synthesized to be a dietary supplement o
Trimethylsulfonium (systematically named trimethylsulfanium and trimethylsulfur(1+)) is an organic cation with the chemical formula (CH3)3S+ (also written as C3H9S+).
No description available.
Carbenium ion
A carbenium ion is a positive ion with the structure RR′R″C+, that is, a chemical species with a trivalent carbon that bears a +1 formal charge. In older literature the name carbonium ion was used for
Pyramidal carbocation
A pyramidal carbocation is a type of carbocation with a specific configuration. This ion exists as a third class, besides the classical and non-classical ions. In these ions, a single carbon atom hove
The xenonium ion, XeH+, is an onium compound, consisting of protonated xenon. Although the existence of the xenonium cation itself has not been proven, salts of the fluoroxenonium ion, XeF+, are known
In chemistry, an oxycation is a polyatomic ion with a positive charge that contains oxygen.
Bismuth polycations
Bismuth polycations are polyatomic ions of the formula Bin+x. They were originally observed in solutions of bismuth metal in molten bismuth chloride. It has since been found that these clusters are pr
Methylpyridinium is a chemical compound which is the quaternary ammonium compound derived from the N-methylation of pyridine. It is found in some coffee products. It is not present in unroasted coffee