2,2,4-Trimethylpentane
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| Names | |
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| IUPAC name
2,2,4-Trimethylpentane
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| Other names
Isooctane
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.007.964 |
| RTECS number |
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CompTox Dashboard (EPA)
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| Properties | |
| C8H18 | |
| Molar mass | 114.232 g·mol−1 |
| Appearance | colorless liquid |
| Density | 688 kg/m3, liquid |
| Melting point | −107.38 °C (−161.28 °F; 165.77 K) |
| Boiling point | 99.3 °C (210.7 °F; 372.4 K) |
| Immiscible | |
| Thermochemistry | |
Std molar
entropy (S⦵298) |
328 J·K−1·mol−1 |
Std enthalpy of
formation (ΔfH⦵298) |
−259 kJ/mol |
Std enthalpy of
combustion (ΔcH⦵298) |
−5461 kJ/mol |
| Hazards | |
| Flash point | 4.5 °C |
| Explosive limits | 1.1–6.0% |
| Related compounds | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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2,2,4-Trimethylpentane, also known as isooctane or iso-octane, is an octane isomer which defines the 100 point on the octane rating scale (the zero point is n-heptane). It is an important component of gasoline.
Isooctane is produced on a massive scale in the petroleum industry, usually as a mixture with related hydrocarbons. The alkylation process alkylates isobutane with isobutylene using a strong acid catalyst. In the NExOCTANE process, isobutylene is dimerized into isooctene and then hydrogenated to isooctane.[1]
See also
References
External links
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