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Consider the following carbanions: ...

Consider the following carbanions:

Correct decreasing order of stability is :

A

`IIgtIIIgtIVgtI`

B

`IIIgtIVgtIgtII`

C

`IVgtIgtIIgtIII`

D

`IgtIIgtIIIgtIV`

Text Solution

Verified by Experts

The correct Answer is:
A
`-NO_(2)` is `-M` group so, stabilies anion while `-underset(* *)overset(* *)OCH_(3)` is `+M` group. So, it destabilise anion.
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HIMANSHU PANDEY-GENERAL ORGANIC CHEMISTRY-Subjective Type Problems
  1. Consider the following carbanions: Correct decreasing order of s...

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  2. Which of the following systems are conjugated?

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  3. Draw all reasonable resonance structures for each species.

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  4. Draw all reasonable resonance structures for each species.

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  5. Determine the hybridization at the carbon atom indicated in each speci...

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  6. Explain each statement using resonance theory. (a) The indicated C-...

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  7. Rank the following dienes in order of increasin heat of hydrogenation.

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  8. How many pi electrons are contained in each molecule ?

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  9. Which compaounds are aromatic? For any compound that is not aromatic, ...

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  10. Which of the following heterocycles are aromatic?

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  11. Lebel each compound as aromatic, antiaromatic, or not aromatic. Assume...

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  12. Hydrocarbons A and B both possess a significant dipolel, even though e...

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  13. Rank the indicated C-C bonds in order of increasing bond length, and e...

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  14. The purine heterocycle occurs commonly in the structure of DNA. (a) ...

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  15. (a) How many pi electrons does C contion? (b) How many pi electrons ...

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  16. Draw additional resonance structure for each species.

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  17. The carbon-carbon bond lengths in naphthalene are not equal. Use a res...

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  18. Which compound in each pair is the stronger acid?

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  19. Treatment of indene with NaNH(2) forms its conjugate base in a Bronste...

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  20. Draw the conjugate bases of pyrrole and cyclopentadiene. Explain why t...

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