Consider the following carbocations1 CH 3- C H 2 2 CH 2- C H3 CH 2- CH - C H 2 4 C 6 H 5- C H 2 stability of these carbocations in decreasing order isA- 4-3-1-2B- 4-3-2-1C- 3-4-2-1D- 3-4-1-2

The correct option is A 4 gt;3 gt;1 gt;2 Benzyl carbocations (C_6H_5⊕CH_2) is most stable due to more number of resonating structure.Allyl carbocations i ...

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Standard XII

Chemistry

Carbanion

Consider the ...

Question

Consider the following carbocations

(1) $C H_{3} - \oplus C H_{2}$ (2) $C H_{2} = \oplus C H$ (3) $C H_{2} = C H - \oplus C H_{2}$ (4) $C_{6} H_{5} - \oplus C H_{2}$ stability of these carbocations in decreasing order is

4>3>1>2

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4>3>2>1

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3>4>2>1

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3>4>1>2

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Solution

The correct option is A
4>3>1>2

Benzyl carbocations $(C_{6} H_{5} \oplus C H_{2}$ ) is most stable due to more number of resonating structure.Allyl carbocations is stable due to resonance. Number of resonating structure in allyl are less than benzyl. Ethyl carbocation is more stable due to hyper conjugation vinyl carbocation is least stable as +ve charge is on sp hybridized carbon.

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Q. 2)

C H_{2} = C H - ⨁ C H_{2}

C_{6} H_{5} - ⨁ C H_{2}

C H_{3} - ⨁ C H - C H_{3}

Decreasing order of stability of the given above carbocations is:

Q. The order of decreasing stability of the carbanions is:
1)

(C H_{3})_{3} C^{-}

(C H_{3})_{2} {C H}^{-}

C H_{3} {C H_{2}}^{-}

C_{6} H_{5} {C H_{2}}^{-}

H_{2} C = C H - C H_{2} - + C H - C H_{3}

H_{3} C - C H_{3} | C | C H_{3} - + C H_{2}

Write these carbocations in decreasing order of their stabilities.

Q. Consider the following carbocations
I.

C H_{3} - C^{⨁} H_{2}

II.

C H_{2} = C^{⨁} H

III.

C H_{2} = C H - C^{⨁} H_{2}

IV.

C_{6} H_{5} - C H_{2}^{⨁}

Stability of these carbocations in decreasing order is?

C H_{3} - C H_{2} - \oplus C H_{2}

C H_{3} - C H | F - \oplus C H_{2}

C H_{3} - C H | B r - \oplus C H_{2}

C H_{3} - C H | C l - \oplus C H_{2}

Arrange the following carbocations in decreasing order of their stability:

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Consider the following carbocations (1) CH3−⊕CH2 (2) CH2=⊕CH (3) CH2=CH−⊕CH2 (4) C6H5−⊕CH2 stability of these carbocations in decreasing order is

Consider the following carbocations

(1) $C H_{3} - \oplus C H_{2}$ (2) $C H_{2} = \oplus C H$ (3) $C H_{2} = C H - \oplus C H_{2}$ (4) $C_{6} H_{5} - \oplus C H_{2}$ stability of these carbocations in decreasing order is