Using a potential energy diagram,explain/illustrate the preferential formation of the 3 substituted product instead of the 2 product in the electrophilic aromatic substitution of indole (shown). 
Definitions:
Demand Curve
A graphical representation showing the relationship between the price of a good and the quantity demanded by consumers at various price levels.
Normal Good
A type of good for which demand increases as the income of the consumer increases, reflecting a direct relationship between income and demand.
Inferior Good
A type of good whose demand decreases as the consumer's income increases, opposite to normal goods.
Complementary Good
A product or service that enhances the use or value of another product or service when used together.
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