Methylidynephosphane

Methylidynephosphane
Names
	Preferred IUPAC name Methylidynephosphane
	Other names Hydrogen cyaphide; Phosphaethyne;
Identifiers
CAS Number	6829-52-3;
3D model (JSmol)	Interactive image;
ChemSpider	122445;
PubChem CID	138843;
CompTox Dashboard (EPA)	DTXSID80218444 ;
	InChI InChI=1S/CHP/c1-2/h1H Key: DPYPSJGRRFKXBE-UHFFFAOYSA-N;
	SMILES C#P;
Properties
Chemical formula	HCP
Molar mass	43.993 g·mol−1
Conjugate base	Cyaphide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Methylidynephosphane (phosphaethyne) is a chemical compound with the chemical formula H C≡P. It was the first phosphaalkyne compound discovered, containing the unusual C≡P carbon-phosphorus triple bond. Although isolated samples of methylidynephosphane are impractical, other derivatives have been well studied such as tert-butylphosphaacetylene. The conjugate base of methylidynephosphane is cyaphide.