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Unit 5: Electronic effects.

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About this unit

The reactions happening in organic chemistry involve the formation of intermediates. (They are formed and consumed within the reaction!) The catch is that a reaction may involve more than one intermediate formation, and thus can be driven in any direction. But it majorly goes in the direction of stable intermediates. And who determines that? Electronic effects!

Inductive effects

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Inductive effect on stability of intermediatesGet 3 of 4 questions to level up!

Resonance

Now that we have learnt about the stability of reaction intermediates using inductive effect, we can proceed and learn about how the delocalization of electrons occur and how this delocalisation helps stabilise reaction intermediates.

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Identifying the correct resonating structure.Get 3 of 4 questions to level up!
Resonance and stability of aliphatic intermediates.Get 3 of 4 questions to level up!
Resonance and stability of aromatic intermediates.Get 3 of 4 questions to level up!
Comparing the stabilities of aromatic and aliphatic intermediates using resonance.Get 3 of 4 questions to level up!

Quiz 1

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Inductive v/s Resonance

Checking who wins between inductive effect or resonance effect in affecting the stability of intermediates.

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Worked ex - Resonance vs Inductive Effects
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Inductive v/s Resonance.Get 3 of 4 questions to level up!

Hyperconjugation

After we have learnt about the delocalisation of pi electrons, its time for us to identify how the C-H bond in the alkyl groups helps stabilise a carbocation (and alkene) when directly attached to it.