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Topic: dehydrohalogenation  (Read 4570 times)

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nemzy

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dehydrohalogenation
« on: November 16, 2004, 07:05:14 PM »
is it posssible to do a dehydrohalogenation of Cl using KOH, ethanol instead of NaNH2, NH3. for example:

CH3-CH2-CL-C (double bond) CH-CH3 ----> CH3CH2C(triple Bond)CH


On the midterm, i put KOH, ethanol, but i got it marked incorrect and the right answer was NaNH2, NH3...but when i read the book, it said either NaNH2, NH3 or KOH, ethanol is possible? somebody help me out here?

Offline maxyoung

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Re:dehydrohalogenation
« Reply #1 on: November 17, 2004, 02:12:51 AM »
it needs harsh condition if you want to use alcoholic KOH, usually around 200oC
if you didn't write this condition down, it will be marked incorrect

dexangeles

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Re:dehydrohalogenation
« Reply #2 on: November 20, 2004, 03:13:41 AM »
you need a strong base on this reaction so the answer would be NaNH2, NH3

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