Gooferking Science
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How to or where to get alkenes
Hello! I am trying to get an alkene molecule. I want it to demonstrate how alkenes can be detected by adding bromine water. Is there a way to make an
alkene or buy it locally? I will use the internet as a last resort.
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sonogashira
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Animal fats, vegetable oils, turpentine, limonene, most essence oils etc.
[Edited on 21-9-2013 by sonogashira]
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Rich_Insane
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d-Limonene is pretty common.
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Cornaboeaux
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I remember a fact from high school books: Bananas and apples and other similar fruits produce ethene when they ripen. The ethene also quickens the
ripening process itself so if you put a banana in a sealed bag it will ripen more quickly than in open air. Maybe you could collect the gas somehow?
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Oopsy_daisy
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Ethanol mixed in a test tube with conentrated sulphuric acid with strong heating yealds ethene gas, simlest of the alkanes. Putting some sand in there
helps the reaction IIRC
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Eddygp
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Quote: Originally posted by Cornaboeaux  | | I remember a fact from high school books: Bananas and apples and other similar fruits produce ethene when they ripen. The ethene also quickens the
ripening process itself so if you put a banana in a sealed bag it will ripen more quickly than in open air. Maybe you could collect the gas somehow?
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IIRC, the amounts are quite negligible, but a batch of fruit inside a bag might be a good idea.
there may be bugs in gfind
[ˌɛdidʒiˈpiː] IPA pronunciation for my Username |
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DJF90
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Easiest source of alkenes is steam distillation of orange peel to get d-limonene (a diterpene). The set-up need not be fancy; when I was back at
school we took some orange peel in a flask, added water, and distilled. The alkene appears as a light oil floating on the surface of the aqueous
distillate. We also used this material to demonstrate the reaction you described, along with several others
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BromicAcid
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Trichloroethylene is a solvent available in some areas. About 8 years ago I purchased some from the local hardware store in an attempt to make carbon
tetrachloride by photochlorination.
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bfesser
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Thread Moved
22-9-2013 at 07:21 |
subsecret
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Some grocery stores, in the pharmaceutical section, will carry turpentine, which is mainly made up of pinene.
Fear is what you get when caution wasn't enough.
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papaya
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https://en.wikipedia.org/wiki/Carotene
In fact many of colored organic substances are (poly)unsaturated..
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