Which species in each pair is more stable?

Name: Problem 80, Chapter 8: Organic Chemistry
Uploaded: 2020-08-18T02:45:06-08:00
Duration: 2 min 50 s
Channel: Madeline Currie
Description: Which species in each pair is more stable?

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Key Concepts

Resonance Stabilization

Resonance stabilization refers to the delocalization of electrons within a molecule, allowing charge or electron density to be spread over several atoms. This dispersion of electrons reduces the energy of the molecule and increases its stability, as the burden of localized charge is minimized.

Inductive Effects

Inductive effects involve the transmission of charge through sigma bonds due to the electronegativity of substituents. Electron-withdrawing groups can stabilize negatively charged species by delocalizing charge, while electron-donating groups can stabilize positive charges.

Hyperconjugation

Hyperconjugation is the stabilizing interaction that results from the overlap of sigma bond electrons (typically C–H or C–C) with an adjacent empty or partially filled p-orbital or pi system. This electron sharing can mitigate the concentration of charge, thus enhancing molecular stability.

Aromaticity

Aromaticity is a special case of resonance stabilization occurring in cyclic, planar molecules with continuous pi electron systems that meet Huckel's rule. Aromatic compounds exhibit significantly enhanced stability compared to their non-aromatic counterparts due to the effective delocalization of electrons.

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