Organic Chemistry

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18. Reactions of Aromatics:EAS and Beyond

EAS:Ortho vs. Para Positions

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In general, we refer to the products of an EAS o,p-director as a mixture – but there are some patterns we can learn. 

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Ortho, Para major products

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There is one exception to this rule – which occurs if the final product can hydrogen-bond with itself. Then, we would expect more ortho, than para product.

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