Nitronium ion
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 removal of an electron from the paramagnetic ni
N-Oxoammonium salt
N-Oxoammonium salts are a class of organic compounds with the formula [R1R2=O]X−. The cation [R1R2=O] is of interest for the dehydrogenation of alcohols. Oxoammonium salts are diamagnetic, whereas the
Bobbitt's salt
Bobbitt's salt is an oxoammonium compound derived from 4-acetamido-2,2,6,6-tetramethylpiperidine. It contains the tetrafluoroborate anion and is named after the American chemist James M. Bobbitt. As a
Vanadyl ion
The vanadyl or oxovanadium(IV) cation, VO2+, is a functional group that is common in the coordination chemistry of vanadium. Complexes containing this functional group are characteristically blue and
Rosocyanine
Rosocyanine and rubrocurcumin are two red colored materials, which are formed by the reaction between curcumin and borates.
Oxocarbenium
An oxocarbenium ion (or oxacarbenium ion) is a chemical species characterized by a central sp2-hybridized carbon, an oxygen substituent, and an overall positive charge that is delocalized between the
Trimethyloxonium tetrafluoroborate
Trimethyloxonium tetrafluoroborate is the organic compound with the formula (CH3)3OBF4. (It is sometimes called "Meerwein's salt" after Hans Meerwein.) This salt is a strong methylating agent, being a
Chloryl
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
Iridium tetroxide
Iridium tetroxide (IrO4, Iridium(VIII) oxide) is a binary compound of oxygen and iridium in oxidation state +8. This compound was formed by photochemical rearrangement of [(η1-O2)IrO2] in solid argon
Pervanadyl
Pervanadyl (VO+2) is a pale yellow oxycation of vanadium(V). It is the predominant vanadium(V) species in acidic solutions with pH between 0 and 2, and its salts are formed by protonation of vanadium(
Dioxygenyl
The dioxygenyl ion, O+2, is a rarely-encountered oxycation in which both oxygen atoms have a formal oxidation state of +1/2. It is formally derived from oxygen by the removal of an electron: O2 → O+2
Plutonyl
The plutonyl ion is an oxycation of plutonium in the oxidation state +6, with the chemical formula PuO2+2. It is isostructural with the uranyl ion, compared to which it has a slightly shorter M–O bond
Oxonium ion
In chemistry, an oxonium ion is any cation containing an oxygen atom that has three bonds and 1+ formal charge. The simplest oxonium ion is the hydronium ion (H3O+).
Oxycation
In chemistry, an oxycation is a polyatomic ion with a positive charge that contains oxygen.
Nitrosonium
The nitrosonium ion is NO+, in which the nitrogen atom is bonded to an oxygen atom with a bond order of 3, and the overall diatomic species bears a positive charge. It can be viewed as nitric oxide wi
Oxalyl
The oxalyl cation, also known as oxalic, has the chemical formula [C2O2]2+. It is the cation derived from oxalic acid. Chemical compounds containing the oxalyl cation include:
Iron(IV) oxytetrafluoroborate
Iron(IV) oxytetrafluoroborate is a chemical compound with the rare Fe(IV) ion. It was first reported in 1998 but was not confirmed. Then in 2006, a more reliable production was reported. It was create
Uranyl
The uranyl ion is an oxycation of uranium in the oxidation state +6, with the chemical formula UO2+2. It has a linear structure with short U–O bonds, indicative of the presence of multiple bonds betwe