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cyclopentane
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Cyclopentane (also called C pentane) is a highly flammable alicyclic hydrocarbon with chemical formula C5H10 and CAS number 287-92-3, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms above and below the plane. It is a colorless liquid with a petrol-like odor. Its freezing point is −94 °C and its boiling point is 49 °C. Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more carbon rings. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure.
Chemical data
- Formula
- C5H10
- Molecular weight
- 70.13 g/mol
- IUPAC name
- cyclopentane
- SMILES
- C1CCCC1
- InChIKey
- RGSFGYAAUTVSQA-UHFFFAOYSA-N
- XLogP
- 3
- Polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Formal charge
- 0
via PubChem
Wikidata facts
- Mass
- 70.078
Show 13 more facts
- Commons category
- Cyclopentane
- melting point
- -93.8
- density
- 0.75
- canonical SMILES
- C1CCCC1
- chemical formula
- C₅H₁₀
- NIOSH Pocket Guide ID
- 0171
- boiling point
- 49.3
- vapor pressure
- 400
- flash point
- -35
- lower flammable limit
- 1.1
- upper flammable limit
- 8.7
- ionization energy
- 10.51
- time-weighted average exposure limit
- 1720
via Wikidata · CC0
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Article
4 sectionsContents
- Production, occurrence and use
- Conformations
- References
- External links
Cyclopentane (also called C pentane) is a highly flammable alicyclic hydrocarbon with chemical formula C5H10 and CAS number 287-92-3, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms above and below the plane. It is a colorless liquid with a petrol-like odor. Its freezing point is −94 °C and its boiling point is 49 °C. Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more carbon rings. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure.
It was first prepared in 1893 by the German chemist Johannes Wislicenus.