Question

Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?
1. 3-Hydroxypentan-2-one
2. 4-Hydroxypentan-2-one
3. 2-Hydroxycyclopentanone
4. 1-Pentanol

Answer 1

Answer:

4-Hydroxypentan-2-one

Explanation:

As we have learned

Secondary alcohol -

-OH   group is attached to secondary carbon.

- wherein

              oH

               |

      R ----c------H

                |

              R'

https://entrancecorner.s3.amazonaws.com/media/uploads/2018/06/01/bbb.PNG    will mostly readily dehyrated to give conjugate alkene

 

 

Option 1)

1-Pentanol

This is incorrect

Option 2)

4-Hydroxypentan-2-one

This is correct

Option 3)

3-Hydroxypentan-2-one

This is incorrect

Option 4)

2-Hydroxycyclopentanone

This is incorrect