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| Cyclopentane | |
|---|---|
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| IUPAC name | Cyclopentane |
| Other names | pentamethylene |
| Identifiers | |
| CAS number | 287-92-3 |
| PubChem | |
| RTECS number | GY2390000 |
| SMILES |
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| Properties | |
| Molecular formula | C5H10 |
| Molar mass | 70.1 g/mol |
| Appearance | clear, colorless liquid |
| Density | 0.751 g/cm3 |
| Melting point |
−94 °C |
| Boiling point |
49 °C, 322 K, 120 °F |
| Acidity (pKa) | ~45 |
| Related compounds | |
| Related compounds | cyclopropane, cyclobutane, cyclohexane |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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Cyclopentane 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 occurs as a colorless liquid with a petrol-like odor. Its melting point is −94 °C and its boiling point is 49 °C.
Industrial usage
Cyclopentane is used in the manufacture of synthetic resins and rubber adhesives and also as a blowing agent in the manufacture of polyurethane insulating foam, as found in may domestic appliances such as refrigerators and freezers, replacing environmentally damaging alternatives such as CFC-11 and HCFC-141b1
More advanced technologies, such as computer hard drives and outerspace equipment employ multiply-alkylated cyclopentane (MAC) lubricants because of their extremely low volatility.2
The United States produces more than half a million kilograms of this chemical per year.
Formulation of cycloalkanes
Cycloalkanes can be formulated via a process known as catalytic reforming.
For example, 2-methylbutane can be reformed into cyclopentane, by use of a platinum catalyst. This is particularly well known in automobiles, as branched alkanes will burn much more readily.
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Wikipedia content modification information:
- This page was last modified on 23 October 2008, at 08:29.
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