carbonium ion

Until the early 1970s, all carbocations were called carbonium ions.

In older literature the name "carbonium ion" was used for what is today called carbenium.

Carbonium ions can be obtained by treating alkanes with very strong acids.

The next simplest carbonium ions after methanium have two carbons.

The C2 carbon atom in the intermediate is pentavalent and therefore a carbonium ion.

A carbocation was previously often called a carbonium ion but chemists questions the exact meaning.

It is a superacid and one of the onium ions, indeed the simplest carbonium ion.

This would be more favorable than hydrogen as oxygen can lend electron density to the carbonium ion via resonance.

Octonium, also known as protonated octane, is a carbonium ion of octane.

Odd graphs have been studied for their applications in chemical graph theory, in modeling the shifts of carbonium ions.

In chemistry, carbonium ion is any cation that has a pentavalent carbon atom bearing a +1 electric charge.

The concept of homoaromaticity has its origins in the debate over the non-classical carbonium ions that occurred in the 1950s.

Since the early 1950s, it had been postulated by many that the TDR mechanism involved a carbonium ion .

He has published twelve books in the fields of lithium chemistry, ab initio molecular orbital theory and carbonium ions.

Also, there are no carbocation rearrangements, as the carbonium ion is stabilized by a resonance structure in which the positive charge is on the oxygen.

The prototypical fluxional molecule is the carbonium ion, which is protonated methane, CH.

Two special types have been suggested: carbenium ions are trivalent and carbonium ions are pentavalent or hexavalent.

The cross-linking paste contains a material capable of donating carbonium ions, and cross-linking takes place at chain ends via a ring opening polymerisation.

This ion is then deprotonated, explaining the hydrogen exchange, or loses a hydrogen molecule to form CH- the carbonium ion.

One textbook to this day stays with the older name of carbonium ion for carbenium ion and reserves the phrase hypervalent carbenium ion for CH.

Although a 1:1 molar ratio of HSOF and SbF best generates carbonium ions, the effects of the system at other molar ratios have also been documented.

The key step is the acceptance by AlCl of a chloride ion lone-pair, forming AlCl and creating the strongly acidic, that is, electrophilic, carbonium ion.

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

In older literature the name carbonium ion was used for this class, but now it refers exclusively to another family of carbocations, the carbonium ions, where the charged carbon is pentavalent.

Since substitution stabilizes the carbonium ion after daminification, the resulting carbonium ion is more likely to react with a nucleophile present (water in this case) and not undergo rearrangement.