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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: nemzy on November 16, 2004, 07:05:14 PM

Title: dehydrohalogenation
Post by: nemzy 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?

Title: Re:dehydrohalogenation
Post by: maxyoung 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

Title: Re:dehydrohalogenation
Post by: dexangeles on November 20, 2004, 03:13:41 AM

you need a strong base on this reaction so the answer would be NaNH2, NH3