Home
Class 12
CHEMISTRY
Electron releasing group pushes electron...

Electron releasing group pushes electrons to ward nitrogen and hence increases the availability of lone pair of electrons and thus increases its basicity on the other hand, electron with drawing group decreases the availability hence makes the amine less basic
Which of the following is the strongest base?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
B
Aliphatic amines are stronger bases than aromatic amines
Promotional Banner

Topper's Solved these Questions

  • AMINES & DIAZO COMPOUNDS

    NARAYNA|Exercise Level -I (H.w)|19 Videos

  • AMINES & DIAZO COMPOUNDS

    NARAYNA|Exercise Level II (H.W.)|15 Videos

  • AMINES & DIAZO COMPOUNDS

    NARAYNA|Exercise Level -III|19 Videos

  • ALDEHYDES, KETONES & CARBOXYLIC ACIDS

    NARAYNA|Exercise CHECK YOUR GRASP|6 Videos

  • BIOMOLECULES

    NARAYNA|Exercise EXERCISE-4 (NCERT EXAMPLAR PROBLEMS)|12 Videos

Similar Questions

Explore conceptually related problems

Electron releasing group pushes electrons to ward nitrogen and hence increases the availability of lone pair of electrons and thus increases its basicity on the other hand, electron with drawing group decreases the availability hence makes the amine less basic Among the following which is more basic

Electron releasing group pushes electrons to ward nitrogen and hence increases the availability of lone pair of electrons and thus increases its basicity on the other hand, electron with drawing group decreases the availability hence makes the amine less basic Which of the following has maximum pK_b value?

Electron withdrawing group on aniline makes it less/more basic.

Assertion (A) Presence of a nitro group at ortho or para position increases the reactivity of haloarenas towards nucleophilic substitution. Reason (R ) Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. Reason: Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

Amines are basic in nature due to the presence of lone pair of electrons on N atom of -NH_(2) group. The basic strength of amines can be expressed by their dissociation constant, K_(b) or pK_(b) . RNH_(2) + H_(2) to R NH_(3)^(+) + OH^(-) K_(b) = ([RHH_(3)^(+)][OH^(-)])/([RNH_(2)]) and pK_(b) = -log K_(b) Greater the K_(b) value or smaller the pK_(b) value, more is the basic strength of amine. Aliphatic amines are stronger bases than ammonia due to the electron releasing effect of alkyl groups. The basic strength among amines decreases as : 2^(@) gt 1^(@) gt 3^(@) Aryl amines such as aniline are less basic than aliphatic amines due to the involvement of lone pair of electrons on N atom with the resonance in benzene. In derivatives of aniline, the electron releasing groups increase the basic strength while electron withdrawing groups decrease the basic strength. The base weakening effect of electron withdrawing group and base strengthening effect of electron releasing group is more marked at p-position than at m-position. Every o- substituted aniline is less basic than aniline due to ortho effect. Which of the following group does not decrease the basic strength of aniline ?

Amines are basic in nature due to the presence of lone pair of electrons on N atom of -NH_(2) group. The basic strength of amines can be expressed by their dissociation constant, K_(b) or pK_(b) . RNH_(2) + H_(2) to R NH_(3)^(+) + OH^(-) K_(b) = ([RHH_(3)^(+)][OH^(-)])/([RNH_(2)]) and pK_(b) = -log K_(b) Greater the K_(b) value or smaller the pK_(b) value, more is the basic strength of amine. Aliphatic amines are stronger bases than ammonia due to the electron releasing effect of alkyl groups. The basic strength among amines decreases as : 2^(@) gt 1^(@) gt 3^(@) Aryl amines such as aniline are less basic than aliphatic amines due to the involvement of lone pair of electrons on N atom with the resonance in benzene. In derivatives of aniline, the electron releasing groups increase the basic strength while electron withdrawing groups decrease the basic strength. The base weakening effect of electron withdrawing group and base strengthening effect of electron releasing group is more marked at p-position than at m-position. Every o- substituted aniline is less basic than aniline due to ortho effect. The strongest base among the following is

NARAYNA-AMINES & DIAZO COMPOUNDS-Level -IV
  1. Electron releasing group pushes electrons to ward nitrogen and hence i...

    Text Solution

    |

  2. Electron releasing group pushes electrons to ward nitrogen and hence i...

    Text Solution

    |

  3. Electron releasing group pushes electrons to ward nitrogen and hence i...

    Text Solution

    |

  4. An aromatic compound 'A' on treatment with aqueous ammonia and heating...

    Text Solution

    |

  5. An aromatic compound 'A' on treatment with aqueous ammonia and heating...

    Text Solution

    |

  6. An aromatic compound 'A' on treatment with aqueous ammonia and heating...

    Text Solution

    |

  7. Which of the following is a 3^(@) amine

    Text Solution

    |

  8. The correct IUPAC name for CH2 ==CH CH2 NH CH3 is

    Text Solution

    |

  9. Which of the following reagents would not be a good choice for reducin...

    Text Solution

    |

  10. In order to prepare a 1^(@) amine from an alkyl halide with simultaneo...

    Text Solution

    |

  11. The source of nitrogen in Gabriel syntheisis of amine is..

    Text Solution

    |

  12. Amongst the given set of reactants, the most approprate for preparing ...

    Text Solution

    |

  13. The best reagent for converting 2-phenylpropanamide into 2-phenylpropa...

    Text Solution

    |

  14. Hofmann's bromamide degradation reaction is shown by

    Text Solution

    |

  15. Which of the following is a 3^(@) amine

    Text Solution

    |

  16. Amongst the following, the strongest base in aqueous medium is

    Text Solution

    |

  17. Which of the following is the weakest Bronsted base?

    Text Solution

    |

  18. Benzylamine may be alkylated as shown in the following equation C(...

    Text Solution

    |

  19. The correct increasing order of basic strength of the following compou...

    Text Solution

    |

  20. Methylamine reacts with HNO(2) to form….

    Text Solution

    |