1,2-Cyclobutanedione

1,2-Cyclobutanedione
Identifiers
CAS Number	33689-28-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	125115;
ECHA InfoCard	100.187.120
PubChem CID	141827;
CompTox Dashboard (EPA)	DTXSID80187368 ;
	InChI InChI=1S/C4H4O2/c5-3-1-2-4(3)6/h1-2H2 Key: QDMRCCGQLCIMLG-UHFFFAOYSA-N;
	SMILES C1CC(=O)C1=O;
Properties
Chemical formula	C4H4O2
Molar mass	84.074 g·mol−1
Appearance	yellow solid
Melting point	65 °C (149 °F; 338 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

1,2-Cyclobutanedione is an organic compound with the formula (CH₂)₂(CO)₂. It is one of two isomers of cyclobutanedione, the other being 1,3-cyclobutanedione. It is prone to polymerization. It is prepared by desilylation of 1,2-bis(trimethylsiloxy)cyclobutene.^[1]

Related compounds

^ Denis, J. M.; Champion, J.; Conia, J. M. (1981). "1,2-Cyclobutanedione". Organic Syntheses. 60: 18. doi:10.15227/orgsyn.060.0018.