Home
Class 12
CHEMISTRY
The decreasing order of the stability of...

The decreasing order of the stability of the ions
`underset((I))underset()(CH_(3)-overset(+)CH-CH_(3)),` `underset((II))underset()(CH_(3)-overset(+)CH-OCH_(3)),` , `underset((III))underset()(CH_(3)-overset(+)CH-COCH_(3)),`

A

`IgtIIgtIII`

B

`IIIgtIIgtI`

C

`IIgtIIIgtI`

D

`IIgtIgtIII.`

Text Solution

Verified by Experts

The correct Answer is:
D
Carbocation (II) is most stable due to resonance

Carbocation Ill is least stable due to electron withdrawing nature of carbonyl group. Carbocation (I) is less stable than (II) because it is stabilised only by the + I effect of the two methyl groups.

Therefore correct order of decreasing stability is `IIgtIgtIII`
Promotional Banner

Topper's Solved these Questions

  • BASIC PRINCIPLES OF ORGANIC CHEMISTRY

    DINESH PUBLICATION|Exercise Matrix Type Questions|2 Videos

  • BASIC PRINCIPLES OF ORGANIC CHEMISTRY

    DINESH PUBLICATION|Exercise REASON ASSERTION TYPE MCQS|12 Videos

  • ALKALI EARTH METALS

    DINESH PUBLICATION|Exercise Unit test-12|5 Videos

  • BIOMOLECULES

    DINESH PUBLICATION|Exercise MATRIX - MATCH TYPE|8 Videos

Similar Questions

Explore conceptually related problems

The decreasing order of the stability of the ions : underset((I))(CH_(3)=overset(+)(C)H-CH_(3))" "underset((II))(CH_(3)-overset(+)(C)H-OCH_(3))" "underset((III))(CH_(3)-overset(+)(C)H-COCH_(3)^(-))

What si the correct order of decreasing stability of the following carbocations. underset(I.)(CH_(3)-overset(o+)(C)H-CH_(3))" "underset(II.)(CH_(3)-overset(o+)(C)H-OCH_(3)) underset(III.)(CH_(3)-overset(o+)(C)H-CH_(2)-OCH_(3))

CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)-underset(O)underset(||)(C)-NHCH_(3)

Arrange the following carbonium ions in order of decreasing stability : underset(I)underset()((CH_(3))_(3)overset(+)C)" "underset(II)underset()((CH_(3))_(2)overset(+)CH)" "underset(III)underset()(CH_(3)overset(+)CH_(2))" "underset(IV)underset()(overset(+)H_(3)C)

CH_(3)-underset(CH_(3))underset(|)(C)=CH-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(3)

CH_(3)-CH_(2)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-CH_(2)OH

Arrange the following free radicals in order of stability underset(I)underset()((CH_(3))_(3)overset(cdot)C)" "underset(II)underset()((CH_(3))_(2)overset(cdot)CH)" "underset(III)underset()(CH_(3)overset(cdot)CH_(2))" "underset(IV)underset()(overset(cdot)CH_(3))

The order of decreasing stability of the following cations is : CH_(3)underset((I))overset(+)CHCH_(3),CH_(3)underset((II))overset(+)CHOCH_(3),CH_(3)overset(+)CHunderset((III))COCH_(3)

DINESH PUBLICATION-BASIC PRINCIPLES OF ORGANIC CHEMISTRY-ULTIMATE PREPARATORY PACKAGE
  1. Which of the following can act both as an electrophile and a nucleophi...

    Text Solution

    |

  2. In Hoffinann bromamide reaction, the reactive intermediate involved is...

    Text Solution

    |

  3. Which of the following can act as an electrophile ?

    Text Solution

    |

  4. Which of the following statements is correct ?

    Text Solution

    |

  5. The - I effect of -NO(2),-CN,-COOH,-Cl decreases in the order

    Text Solution

    |

  6. The + I effect of (CH(3))(3)C-(I), CH(3))(2)CH-(II), CH(3)CH(2)- (III)...

    Text Solution

    |

  7. Arrange the following free radicals in order of stability underset(I...

    Text Solution

    |

  8. Arrange the following free radicals in order of stability underset(I...

    Text Solution

    |

  9. Arrange the following carbonium ions in order of decreasing stability ...

    Text Solution

    |

  10. The inductive effect of the alkyl groups on a saturated carbon chain f...

    Text Solution

    |

  11. Which of the following is most stable alkene ?

    Text Solution

    |

  12. Which one of the following has inductive, mesomeric and hyperconjugati...

    Text Solution

    |

  13. Consider the following alkenes : 1. H(2)C=C(CH(2)CH(3))CH(CH(3))(2) ...

    Text Solution

    |

  14. Which one of the following compounds would have the highest heat of hy...

    Text Solution

    |

  15. Which of the following is most stable alkene ?

    Text Solution

    |

  16. The less stable carbocation rearranges to more stable carbocation ion....

    Text Solution

    |

  17. The decreasing order of the stability of the ions underset((I))under...

    Text Solution

    |

  18. In but-1, 3-diene the C(2)-C(3) bond length is

    Text Solution

    |

  19. The most stable carbocation is

    Text Solution

    |

  20. A solution of ( + )-1-chloro-1-phenylethane in t toluene racemises slo...

    Text Solution

    |