Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Pyrylium is a cation (positive ion) with formula C5H5O+, consisting of a six-membered ring of five carbon atoms, each with one hydrogen atom, and one positively charged oxygen atom. The bonds in the ring are conjugated as in benzene, giving it an aromatic character. In particular, because of the positive charge, the oxygen atom is trivalent. Pyrilium is a mono-cyclic and heterocyclic compound, one of the oxonium ions.
^International Union of Pure and Applied Chemistry (2014). Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013. The Royal Society of Chemistry. p. 1097. doi:10.1039/9781849733069. ISBN 978-0-85404-182-4.
Pyrylium is a cation (positive ion) with formula C5H5O+, consisting of a six-membered ring of five carbon atoms, each with one hydrogen atom, and one positively...
and chromenylium (also called benzopyrylium) is a bicyclic version of pyrylium. The positive charge can move around the molecule. At least 31 monomeric...
synthesized by Gottfried Märkl in 1966 by condensation of the corresponding pyrylium salt and phosphine or its equivalent ( P(CH2OH)3 and P(SiMe3)3). The (unsubstituted)...
4H-pyran easily disproportionates to the corresponding dihydropyran and the pyrylium ion, which is easily hydrolyzed in aqueous medium. Although the pyrans...
carbon atom, but actually selenium is substituted for the oxygen atom in pyrylium. In the Hantzsch-Widman system of nomenclature, it is called seleninium...
analogous to the pyrylium cation with the oxygen atom replaced by a sulfur atom. Thiopyrylium salts are less reactive than the analogous pyrylium salts due to...
borabenzene, silabenzene, germanabenzene, stannabenzene, phosphorine or pyrylium salts the aromaticity is still retained. Aromaticity also occurs in compounds...
the DPDB ligand Another synthesis route starts from the of pyridinium or pyrylium salts with cyclopentadienyl anion: Azulene can also be synthesized via...
6-triphenylphosphabenzene. This is achieved by treating 2,4,6-trisubstituted pyrylium salt with phosphanes. The first derivative of arsabenzene was 9-arsaanthracene...
(This was measured in the crystal structure of tetraphenyl telluropyrylium-pyrylium monomethine fluoroborate. When the ring of telluropyrylium is fused with...
+1 cation derived by protonation of a hydride (includes oxonium ions) Pyrylium, a subtype of oxonium ion Sulfonium, a sulfur analog that can be chiral...
cations where oxygen is a member of a ring, RO+R (the ring may be aromatic) pyrylium, C5H5O+ tertiary sulfonium cations having one triple-bonded substitution...
tautomers depending on pH and hydration, several of these bare the distinctive pyrylium core. Asahina, Yasuhiko; Inubuse, Mototaro (1928). "Über die Reduktion...
investigating the synthesis and properties of pyrylium salts. He discovered with co-workers a new way of synthesis of pyrylium salts by diacylation of alkenes. This...
them to oxatriquinane. Triethyloxonium tetrafluoroborate Brookhart's acid Pyrylium salt Mark Mascal; Nema Hafezi; Nabin K. Meher & James C. Fettinger (2008)...
hydroxyl-terminated atomic defects that participate in a Grotthuss-type relay, while pyrylium-like ether terminations did not. Recently, Paul and co-workers at IISER...
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