a carbonium ion is a cation that has a pentacoordinated carbon atom. They are a type of carbocation. In older literature, the name "carbonium ion" was...

carbonium ions with the formula R5+. In carbenium ions charge is localized. They are isoelectronic with monoboranes such as B(CH3)3. Carbenium ions are...

vinyl C 2H+ 3 cations. Until the early 1970s, carbocations were called carbonium ions. In the present-day definition given by the IUPAC, a carbocation is...

(protonated borane) further boronium cations, B xH+ y (protonated boranes) carbonium ions (protonated hydrocarbons) have a pentacoordinated carbon atom with a...

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 having...

term 2-norbornyl cation (or 2-bicyclo[2.2.1]heptyl cation) describes a carbonium ionic derivative of norbornane. A salt of the 2-norbornyl cation was crystallized...

protonates some hydro­carbons to afford pentacoordinate carbo­cations (carbonium ions). Like its precursor hydrogen fluoride, it attacks glass, but can be...

In chemistry, a nonclassical ion usually refers to carbonium ions, a family of organic cations. They are characterized by delocalized three-center, two-electron...

by AlCl3 of a chloride ion lone-pair, forming AlCl−4 and creating the strongly acidic, that is, electrophilic, carbonium ion. RCl +AlCl3 → R+ + AlCl−4...

deprotonation of a nearby water molecule. Resulting hydroxyl attacks ribose carbonium ion. Depurination of adenine results in a neutral ribose on an intact phosphodiester...

conditions yield the carboxylic acid and the ammonium ion while basic hydrolysis yield the carboxylate ion and ammonia. The protonation of the initially generated...

used by George Olah to stabilise carbocations and hypercoordinated carbonium ions in liquid media. Magic acid and other superacids are also used to catalyze...

trivalent (classical) carbenium ions from three-center bound penta- or tetracoordinated (nonclassical) carbonium ions. Role of carbocations in electrophilic...

243G. doi:10.1016/j.ijms.2004.07.012. Cacace, Fulvio (1970). Gaseous Carbonium Ions from the Decay of Tritiated Molecules. Advances in Physical Organic...

reactions: dielectric, electrostatic and steric stabilization of the carbonium ion in the reaction of lysozyme". Journal of Molecular Biology. 103 (2):...

intermediate can spontaneously rearrange to form the arylamidonium ion and a carbonium ion which can interact directly with DNA to produce DNA adducts. In...

this by adding a hydrogen ion to the glycosidic atom by an imidazolium cation. From there, an unstable intermediate carbonium ion will be left behind by...

1950s, it had been postulated by many that the TDR mechanism involved a carbonium ion. However, a major breakthrough in the development of the TDR mechanism...

1021/jo00398a039. Carey, Francis A.; Tremper, Henry S. (January 1969). "Carbonium ion-silane hydride transfer reactions. II. 2-Phenyl-2-norbornyl cation"...

Ionic hydrogenation is employed when the substrate can produce a stable carbonium ion. Polar double bonds are favored substrates. Because silicon (1.90) is...

Wallis and Adams in 1933 as the negatively charged counterpart of the carbonium ion Carbocation Enolates Nitrile anion IUPAC, Compendium of Chemical Terminology...

over the non-classical carbonium ions that occurred in the 1950s. Saul Winstein, a famous proponent of the non-classical ion model, first described homoaromaticity...

(1972). "Nature of the (CH)5+ species. II. Direct observation of the carbonium ion of 3-hydroxyhomotetrahedrane derivatives". J. Am. Chem. Soc. 94 (25):...

Reactions: Dielectric Electrostatic and Steric Stabilization of the Carbonium Ion in the Reaction of Lysozyme". J. Mol. Biol. 103 (2): 227–249. doi:10...

1021/cr00089a013. Mahler, J. E.; Pettit, R. (1962). "Pentadienyl and Hexadienyl Carbonium Ions as Ligands in Stable Complex Cations". J. Am. Chem. Soc. 84 (8): 1511–1512...

Crystal structure of [PtI[MeC6H3(CH2NMe2)2-o,o']]BF4: a cyclohexadienyl carbonium ion with a .sigma.-bonded metal substituent". Journal of the American Chemical...

that gives it a +1 electric charge. Ethanium is one of the simplest carbonium ions (after methanium CH+ 5). It was first detected as a rarefied gas in...

reactions: Dielectric, electrostatic and steric stabilization of the carbonium ion in the reaction of lysozyme". Journal of Molecular Biology. 103 (2):...

necessary for isomerization. The transition state consists of a high energy carbonium ion that is stabilized through all the metal interactions with the sugar...

Jaruzelski, and Alan Schriesheim (1955) "Carbonium ions. I. An acidity function (C0) derived from arylcarbonium ion equilibria." Journal of the American Chemical...