3.5- mechanisms of alcohols

Question 1

4 stages of acid catalysed elimination

Answer 1

1.alcohol is protonated by H2SO4 catalyst (H+)
2.C-O bond breaks and forms H2O as a by-product
3.C=C breaks, leaving a carbocation and water
4. alkene is formed

Question 2

stages of direct hydration

Answer 2

1.C=C donates electron pair to acid catalyst (H+)
2.water donates lone pair to carbocation and joins it
3.water molecule loses a H+ (H-O bond breaks)
4.alcohol forms