EAS Electrophilic Aromatic Substitution

For Rxn 1 (above) draw curved arrows showing the mechanism of electrophilic addition of HCI. 

Draw the carbocation that would form in Rxn 2, and explain why this carbocation goes back to the starting material (H-Cl and benzene) instead of forming the product. 

Use curved arrows to show a reasonable mechanism for Rxn 3 in Model 2. (Hint The first step is formation of a carbocation intermediate, just as in Rxn 2.) 

Rxns 2 and 3 have the same starting materials and carbocation intermediate, but different products. The energy diagram for Rxn 2 (using DCl in place of HCl) is shown below using a dotted line. On this same set of axes, draw a solid line showing the progress of Rxn 3. 

Construct an explanation for why Rxn 3 is much more Ukely to occur than Rxn 2. (Note Rxn 2 does not occur under normal circumstances.) 

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Draw a generalized mechanism for EAS (Electrophilic Aromatic Substitution) showing the... 

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