Cyclobutyne

Cyclobutyne
Names
	Preferred IUPAC name Cyclobutyne
Identifiers
CAS Number	1191-94-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	10637133 ;
PubChem CID	20072734;
CompTox Dashboard (EPA)	DTXSID80602147 ;
	InChI InChI=1S/C4H4/c1-2-4-3-1/h1-2H2 Key: DRFGMUMDUXDALH-UHFFFAOYSA-N ;
	SMILES C1#CCC1;
Properties
Chemical formula	C4H4
Molar mass	52.076 g·mol−1
	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

Cyclobutyne (C₄H₄) is a hydrocarbon molecule containing a triple bond within a four carbon atom ring. This cycloalkyne is very unstable due to its high ring strain and has not been isolated in the pure state. However, osmium coordination complexes containing cyclobutyne have been synthesized.