Reaction with cold concentrated H2SO4

• What’s sulphuric acid written out 


  H-OSO2OH
• How to do the mechanism

  1. The first stage : draw a curly arrow from the pi bond in the alkene to the H in the acid
  2. Make sure delta signs are present
  3. Draw a second curly arrow from the H-O bond to the H
  4. The next stage : draw the alkene again without the double bond, a plus sign, and an extra H attatched
  5. draw A third curly arrow from the negative sign on the now OSO2OH with a lone pair to the positive sign
  6. the last product should be the main result with the OSO2OH replacing the plus sign
• How does reaction with h2SO4 create an alcohol

  After OSO2OH replaces the + sign, it gets hydrolysed by H2O, to leave behind OH