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AS Organic Chem Question

Which alcohol forms a mixture of alkenes when dehydrated?
A 2-methylpropan-1-ol
B propan-2-ol
C butan-1-ol
D butan-2-ol

The answer is D but can someone please explain why and also why it would not be any of the other options? Thanks!
Reply 1
Original post by pigeonwarrior
Which alcohol forms a mixture of alkenes when dehydrated?
A 2-methylpropan-1-ol
B propan-2-ol
C butan-1-ol
D butan-2-ol

The answer is D but can someone please explain why and also why it would not be any of the other options? Thanks!

D is an unsymmetrical secondary alcohol. Think about the different structures of the alkenes and the different groups attached to each end of the double bond.

Have a look at this chemguide page: https://www.chemguide.co.uk/organicprops/alcohols/dehydration.html
Original post by bl0bf1sh
D is an unsymmetrical secondary alcohol. Think about the different structures of the alkenes and the different groups attached to each end of the double bond.

Have a look at this chemguide page: https://www.chemguide.co.uk/organicprops/alcohols/dehydration.html

Thank uuu I finally understand it now! 😁

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