What is the most effective way to determine the stability of carbocations?

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In summary, the conversation discusses the stability of a molecule with different polar effects. The answer is determined to be option 4 due to the +R effect of OCH3. The discussion also includes advice on studying and learning about polar effects in chemistry.
  • #1
Priyadarshini
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Homework Statement

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The Attempt at a Solution


Shouldn't the answer be 4?
It certainly isn't 1 or 3 because they have maximum -I effect
 
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  • #2
How did you conclude it was 4 after you narrowed it down to 2 and 4?
 
  • #3
Suraj M said:
How did you conclude it was 4 after you narrowed it down to 2 and 4?
OCH3 is an electron withdrawing group. So it will result in -R effect, making it less stable. Which leaves only option 4.
 
  • #4
OCH3 is -R? Are you sure
I think you're confusing it with -I
 
  • #5
Suraj M said:
OCH3 is -R? Are you sure
I think you're confusing it with -I
Oh, right. It has a +R effect, so more stable. Thank you!
 
  • #6
Have you officially been taught all these polar effects? Because that's in 12th.
Are you reading ahead? If so I would advice you to solve from a book that provides detailed answers for these questions, it'll help you learn.
 
  • #7
Suraj M said:
Have you officially been taught all these polar effects? Because that's in 12th.
Are you reading ahead? If so I would advice you to solve from a book that provides detailed answers for these questions, it'll help you learn.
At school we don't have any of these on syllabus, so I'm doing it on my own.
 
  • #8
Okay then as I said
Choose a book with good solutions provided
And after a while you'll get a hang of it
Hey I think your school will have it next year ask your teacher
 

FAQ: What is the most effective way to determine the stability of carbocations?

What is a carbocation?

A carbocation is a positively charged carbon atom that is missing one electron. It is a highly reactive intermediate in many organic chemical reactions.

How does the stability of a carbocation affect a reaction?

The stability of a carbocation directly affects the rate of a reaction. More stable carbocations are formed faster, leading to faster reactions.

What factors contribute to the stability of a carbocation?

The stability of a carbocation is influenced by the number of substituents attached to the positively charged carbon atom, the presence of resonance structures, and the inductive effect of neighboring atoms.

How do neighboring atoms affect the stability of a carbocation?

The inductive effect of neighboring atoms can either stabilize or destabilize a carbocation. Electron-donating groups, such as alkyl groups, can increase stability by donating electrons, while electron-withdrawing groups, such as halogens, can decrease stability by withdrawing electrons.

How can the stability of a carbocation be predicted?

The stability of a carbocation can be predicted by considering the three factors mentioned above: the number of substituents, resonance, and inductive effects. Generally, the more substituents and resonance structures a carbocation has, the more stable it will be.

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