Pyrylium

Pyrylium
Names
	Preferred IUPAC name Pyrylium
	Other names Pyranium
Identifiers
CAS Number	289-67-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1421881
ChEBI	CHEBI:36120 ; salt: CHEBI:59658; family: CHEBI:59657;
ChemSpider	7827742 ;
Gmelin Reference	558560
PubChem CID	9548819;
CompTox Dashboard (EPA)	DTXSID40429539 ;
	InChI InChI=1S/C5H5O/c1-2-4-6-5-3-1/h1-5H/q+1 Key: WVIICGIFSIBFOG-UHFFFAOYSA-N ; InChI=1/C5H5O/c1-2-4-6-5-3-1/h1-5H/q+1 Key: WVIICGIFSIBFOG-UHFFFAOYAF;
	SMILES [o+]1ccccc1;
Properties
Chemical formula	C5H5O+
Molar mass	81.09 g/mol
Related compounds
Related compounds	thiopyrylium, selenopyrylium, telluropyrylium
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

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.

[1] 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.

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