Phosphole

Phosphole
Names
	Preferred IUPAC name 1H-Phosphole
Identifiers
CAS Number	288-01-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	144273;
PubChem CID	164575;
CompTox Dashboard (EPA)	DTXSID60182977 ;
	InChI InChI=1S/C4H5P/c1-2-4-5-3-1/h1-5H;
	SMILES P1C=CC=C1;
Properties
Chemical formula	C4H5P
Molar mass	84.058 g·mol−1
Related compounds
Related compounds	Pyrrole, bismole, arsole, stibole; phosphorine
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phosphole is the organic compound with the chemical formula C
₄H
₄PH; it is the phosphorus analog of pyrrole. The term phosphole also refers to substituted derivatives of the parent heterocycle. These compounds are of theoretical interest but also serve as ligands for transition metals and as precursors to more complex organophosphorus compounds.

Triphosphole, C
₂H
₃P
₃, is a heterocycle with 3 phosphorus atoms.

Pentaphosphole, P
₅H, is a cyclic compound with 5 phosphorus atoms.

^ Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 146. doi:10.1039/9781849733069-00130. ISBN 978-0-85404-182-4.