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Topic: If given a liquid called C6H12...  (Read 4256 times)

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Byrne

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If given a liquid called C6H12...
« on: June 05, 2005, 07:57:22 PM »
how could you determine if it is a cycloalkane or an alkene?

Cycloalkanes and alkenes both have the same general formula: CnH2n

Their physical/chemical properties obviously differ, so what kind of test could you perform to help determine what type of hydrocarbon the liquid is?  

Thanks.
« Last Edit: June 05, 2005, 07:59:00 PM by Byrne »
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Offline movies

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Re:If given a liquid called C6H12...
« Reply #1 on: June 05, 2005, 08:29:06 PM »
NMR, IR, UV-vis...

You could also just spot it on a TLC plate and stain it with KMnO4, that won't react with alkanes.

A host of reactions would tell you, but if you just want to qualitatively tell if there is a C=C bond, the above are probably the fastest.
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Offline xiankai

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Re:If given a liquid called C6H12...
« Reply #2 on: June 06, 2005, 06:57:06 AM »
another way is to bubble bromine gas into the solution, an alkane will not react but an alkene will decolourise it.
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