Cyclobutane

Cyclobutane

Names
Preferred IUPAC name Cyclobutane
Identifiers
CAS Number	287-23-0 Y[EBI]
3D model (JSmol)	Interactive image
Beilstein Reference	1900183
ChEBI	CHEBI:30377
ChemSpider	8894 Y
ECHA InfoCard	100.005.468
EC Number	206-014-5
Gmelin Reference	81684
PubChem CID	9250
UNII	5X619RB2CY N
UN number	2601
CompTox Dashboard (EPA)	DTXSID2059772
SMILES C1CCC1
Properties
Chemical formula	C4H8
Molar mass	56.107 g/mol
Appearance	Colorless gas
Density	0.720 g/cm3
Melting point	−91 °C (−132 °F; 182 K)
Boiling point	12.5 °C (54.5 °F; 285.6 K)
Hazards
NFPA 704	4 1 0
Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Cyclobutane is a cycloalkane organic compound with the formula (CH_2)4, a colorless gas at room temperature. Cyclobutane is usually sold as a liquified gas (a gas that has been pressurized or frozen to be in a state that isn't natural). Variants of cyclobutane are called cyclobutanes. Cyclobutane has no uses in commerce or biology,^[1] but compounds containing cyclobutane are important in biology and biotechnology.

The carbon atoms within cyclobutane are at odd angles. Cyclobutane is unstable and will break at temperatures over about 500° celcius. Cyclobutane is connected to itself in a ladder-like structure. An example of this structure can be seen in in pentacycloanammoxic acid. This compound is a ladderane made up of five connected cyclobutane units.