electrophilic addition by HBr

• electrophilic addition by HBr forms a bromoalkane
• an unsymmetrical alkene forms a minor and major product in electrophilic addition
• the stronger the positive inductive effect the greater stability
• markpoints for electrophilic addition by HBr


  m1: curly arrow from C double bond to delta positive H

  m2: curly arrow from middle of H and Br bond to show bond breaking

  m3: alkane formed and carbocation intermediate formed on C without H

  m4: curly arrow from middle of e- on :Br- to carbocation intermediate
• if HBr is added to a symmetrical alkene in electrophilic addition it forms one product
• if HBr is added to an unsymmetrical alkene in electrophilic addition it will form a major and minor product