Undecane
| Undecane | |
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Undecane[1] |
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| Identifiers | |
| CAS number | 1120-21-4  |
| PubChem | 14257 |
| ChemSpider | 13619 |
| UNII | JV0QT00NUE |
| EC number | 214-300-6 |
| UN number | 2330 |
| MeSH | undecane |
| ChEBI | CHEBI:46342 |
| ChEMBL | CHEMBL132474 |
| RTECS number | YQ1525000 |
| Beilstein Reference | 1697099 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C11H24 |
| Molar mass | 156.31 g mol−1 |
| Exact mass | 156.187800768 g mol−1 |
| Appearance | Colorless, transparent liquid |
| Odor | Petrolic |
| Density | 740 mg mL−1 |
| Melting point |
-27--25 °C, 246.6-248.2 K, -16--13 °F |
| Boiling point |
193-197 °C, 466-470 K, 379-386 °F |
| log P | 6.312 |
| Vapor pressure | <50 Pa (at 20 °C) |
| Refractive index (nD) | 1.417 |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
−329.8–−324.6 kJ mol−1 |
| Std enthalpy of combustion ΔcH |
−7.4339–−7.4287 MJ mol−1 |
| Standard molar entropy S |
458.15 J K−1 mol−1 |
| Specific heat capacity, C | 345.05 J K−1 mol−1 |
| Hazards | |
| GHS pictograms |   |
| GHS signal word | DANGER |
| GHS hazard statements | H304, H315, H319, H331, H335 |
| GHS precautionary statements | P261, P301+310, P305+351+338, P311, P331 |
| EU classification |  Xn |
| R-phrases | R36/37/38, R65 |
| S-phrases | S26, S36 |
| Flash point | 62 °C |
| Related compounds | |
| Related alkanes | |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 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.[2] 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.
[edit] See also
[edit] References
- ^ "undecane - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=14257&loc=ec_rcs. Retrieved 5 January 2012.
- ^ Hölldobler B, Wilson EO (1990). The Ants. Harvard University Press. ISBN 0-674-04075-9, p. 287
[edit] External links
- Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases
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