Undecane

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Undecane
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Template:Longitem 1697099
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MeSH undecane
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UN number 2330
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Template:Longitem Template:Chembox Elements/molecular formula
Molar mass Template:Chem molar mass
Appearance Colorless liquid
Odor Gasoline-like to Odorless
Density 740 g/L
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log P 6.312
Vapor pressure 55 Pa (at 25 °C)[2]
Template:Longitem 5.4 nmol Pa−1 kg−1
Template:Longitem −131.84·10−6 cm3/mol
Template:Longitem 1.417
Template:Longitem 345.05 J K−1 mol−1
Template:Longitem 458.15 J K−1 mol−1
Template:Longitem −329.8 – −324.6 kJ mol−1
Template:Longitem −7.4339 – −7.4287 MJ mol−1
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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.[4]

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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External links

  • Undecane at Dr. Duke's Phytochemical and Ethnobotanical Databases

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