Resonance Structures
The Organic Chemistry Tutor・2 minutes read
Resonance structures involve electron flow between charged regions, with tertiary allylic carbocations being the most stable. Different carbocations and ions exhibit varying stability based on resonance structure and charge placement to satisfy octet rules.
Insights
- Resonance structures involve electron movement towards regions with lower negative charge, crucial for understanding stability in various carbocations and ions.
- The placement of charges in resonance structures is influenced by factors like atom size and octet rule satisfaction, impacting stability and major contributor determination in different molecules.
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Recent questions
What is the concept of resonance structures?
Resonance structures involve electron flow from high to low negative charge regions.
How do allylic carbocations exhibit resonance?
Resonance structure for allylic carbocation: double bond shifts to right, exchanging places with positive charge.
What determines the major resonance contributor for primary allylic carbocations?
Major resonance contributor determination: primary allylic carbocations are equally stable.
How does the stability of tertiary allylic carbocations compare to primary and secondary ones?
Tertiary allylic carbocation stability surpasses primary and secondary ones.
What are the resonance structures of benzylic carbocations?
Benzylic carbocation resonance structures: primary is major contributor, tertiary more stable.
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Summary
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"Resonance Structures in Carbocations and Molecules"
- Resonance structures involve electron flow from high to low negative charge regions.
- Resonance structure for allylic carbocation: double bond shifts to right, exchanging places with positive charge.
- Major resonance contributor determination: primary allylic carbocations are equally stable.
- Tertiary allylic carbocation stability surpasses primary and secondary ones.
- Benzylic carbocation resonance structures: primary is major contributor, tertiary more stable.
- Benzene molecule resonance structure involves rotating pi bonds.
- Carboxylate ion resonance structure: equally stable structures due to identical nature.
- Sulfur atom vs. oxygen atom negative charge placement: sulfur favored due to larger size.
- Alcohol with adjacent positive charge resonance structure: major contributor has positive charge on carbon to satisfy octet rule.
