Undecane
| Structural formula of undecane | |
| Skeletal formula of undecane with all implicit carbons shown, and all explicit hydrogens added | |
| Ball-and-stick model of the undecane molecule | |
| Names | |
|---|---|
| IUPAC name
Undecane[1]
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| Identifiers | |
1120-21-4  |
|
| 1697099 | |
| ChEBI | CHEBI:46342 |
| ChEMBL | ChEMBL132474 |
| ChemSpider | 13619 |
| EC Number | 214-300-6 |
| Jmol 3D model | Interactive image |
| MeSH | undecane |
| PubChem | 14257 |
| RTECS number | YQ1525000 |
| UNII | JV0QT00NUE |
| UN number | 2330 |
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| Properties | |
| C11H24 | |
| Molar mass | 156.31 g·mol−1 |
| Appearance | Colorless liquid |
| Odor | Gasoline-like to Odorless |
| Density | 740 mg mL−1 |
| Melting point | −26.6 to −25.0 °C; −15.8 to −12.9 °F; 246.6 to 248.2 K |
| Boiling point | 193 to 197 °C; 379 to 386 °F; 466 to 470 K |
| log P | 6.312 |
| Vapor pressure | 55 Pa (at 25 °C)[2] |
|
Henry's law
constant (kH) |
5.4 nmol Pa−1 kg−1 |
|
Refractive index (nD)
|
1.417 |
| Thermochemistry | |
| 345.05 J K−1 mol−1 | |
|
Std molar
entropy (S |
458.15 J K−1 mol−1 |
|
Std enthalpy of
formation (ΔfH |
−329.8–−324.6 kJ mol−1 |
|
Std enthalpy of
combustion (ΔcH |
−7.4339–−7.4287 MJ mol−1 |
| Vapor pressure | {{{value}}} |
| Related compounds | |
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Related alkanes
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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 | |
Undecane (also known as hendecane) is a liquid alkane hydrocarbon with the chemical formula CH3(CH2)9CH3. It is used as a mild sex attractant for various types of moths and cockroaches, and an alert signal for a variety of ants.[3] It has 159 isomers.
Undecane may also be used as an internal standard in gas chromatography when working with other hydrocarbons. Since the boiling point of undecane (196 °C) is well known, it may be used as a comparison for retention times in a gas chromatograph for molecules whose structure has been freshly elucidated. For example, if one is working with a 50 m crosslinked methyl silicone capillary column with an oven temperature increasing slowly, beginning around 60 °C, an 11-carbon molecule like undecane may be used as an internal standard to be compared with the retention times of other 10-, 11-, or 12- carbon molecules, depending on their structures.
See also
References
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<references />, or <references group="..." />External links
- Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Hölldobler B, Wilson EO (1990). The Ants. Harvard University Press. ISBN 0-674-04075-9, p. 287
