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The hyperconjugative stabilities of tert...

The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due to

A

`sigmararrp` (empty) and `sigmararrpi^(**)` electron delocalizations

B

`sigmararrsigma^(**)` and `sigmararrpi` delectron delocalizations

C

`sigmararrp` (filled) and `sigmararrpi` electron delocalizations

D

p(fillled)`rarrsigma^(**)` and `sigma rarrpi^(**)` electron delocalizations

Text Solution

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The correct Answer is:
A
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(A) tert-Butyl methyl ether on cleavage with HI at 373K gives tert-butyl iodide and methanol. (R ) The reaction occurs by S_(N^(2)) mechanism.

OP TANDON-BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)-OBJECTIVE QUESTIONS (Level-A)
  1. The hydrolysis of 2-bromo-3-methylbutane by S(N^(1)) mechanism gives m...

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  2. The electrophile, E^((o+)) attacks the benzene ring to generate the in...

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  3. Which one of the following carbanions is the least stable?

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  4. CH(3)CH(2)Cl undergoes homolytic fission produces:

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  5. Tertiary butyl chloride preferably undergo hydrolysis by:

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  6. In a S(N^(2)) substitution reaction of the type R-Br+Cl^(-)overset("...

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  7. The correct stability order for the following speceis is :

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  8. Arrange the carbanions, (CH(3))(3)bar(C),bar(C)Cl(3),(CH(3))(2)bar(C)H...

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  9. Which of the following carbocations will be more stable?

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  10. Arrange the following free radicals in order of decreasing stability: ...

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  11. The most easily hydrolysed molecule under S(N^(1)) condition is:

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  12. Least active electrophile is :

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  13. In the following carbocation, H//CH(3) that is most likely to migrate ...

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  14. Arrange the following resonating structures in order of increasing sta...

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  15. Identify a species which is not a Bronsted acid but a Lewis acid:

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  16. A solution of (-l)- chloro -1 phenyletane in toluene recemises slowly ...

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  17. The order of stability of the following carbocations: underset("I")(...

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  18. The hyperconjugative stabilities of tert-butyl cation and 2-butene, re...

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  19. KI in acetone, undergoes S(N)2 reaction with each of P,Q ,R and S The ...

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  20. Which of the following molecules is least resonance stabilised?

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