Home
Class 12
CHEMISTRY
Why are secondary and tertiary alcohols ...

Why are secondary and tertiary alcohols not suitable for praparing ethers by dehydration with conc. `H_(2)SO_(4)` ?

Text Solution

Verified by Experts

Both secondary and tertiary alcohols react wih conc. `H_(2)SO_(2)` according to `S_(N^(1))` mechanism in which carbocation intermediates are formed. These intermediates preferbly lose a `H^(+)` ion from `beta` carbon leading to alkenes as a result of elimination rather than taking part in subsitutio reactions forming ethers. For details, consult methods of preparation of ethers (section 22)
Promotional Banner

Topper's Solved these Questions

  • ETHERS

    DINESH PUBLICATION|Exercise QUESTIONS FROM BOARD EXAMINATIONS|17 Videos

  • ETHERS

    DINESH PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS (HOTS) QUESTIONS|6 Videos

  • ETHERS

    DINESH PUBLICATION|Exercise LONG ANSWER TYPE QUESTIONS|4 Videos

  • ELECTROCHEMISTRY

    DINESH PUBLICATION|Exercise ADDITIONAL NUMERICAL PROBLEMS FOR PRACTICE|12 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    DINESH PUBLICATION|Exercise Brain Storming Multiple Chocie Questions|7 Videos

Similar Questions

Explore conceptually related problems

Arrange the following alcohols in the decreasing order of dehydration with conc. H_(2)SO_(4) .

Which of the following yields But-2 ene on dehydration with conc. H_(2)SO_(4) ?

on dehydration with conc. H_(2)SO_(4) forms predominantly :

on dehydration with conc. H_(2)SO_(4) predominantly forms :

Which of the following alcohols on dehydration with conc. H_(2)SO_(4) will yield But-2-ene ?

Predict the product when alcohol undergoes dehydration with conc. H_(2)SO_(4) .

Dehydration of methyl alcohol with conc. H_(2)SO_(4) yields

DINESH PUBLICATION-ETHERS-ADDITIONAL IMPORTANT QUESTIONS
  1. Ethers have less dipole moments than alcohols. Justify.

    Text Solution

    |

  2. Sodium metal can be used to dry diethyl ether and not ethyl alcoho. Wh...

    Text Solution

    |

  3. Why are ethers highly inflammale substances ?

    Text Solution

    |

  4. An ether possesses dipole moment even if the alkyl groups present in i...

    Text Solution

    |

  5. Dimethyl ether is completely soluble in water but diethyl ehter is sol...

    Text Solution

    |

  6. Ethers are relatively inert. Justify.

    Text Solution

    |

  7. why is it not possible to prepare ditertiary butyl ether by Williamson...

    Text Solution

    |

  8. With the help of Williamson's synthesis, prepare the following ethers....

    Text Solution

    |

  9. Why are secondary and tertiary alcohols not suitable for praparing eth...

    Text Solution

    |

  10. Methyl phenyl ether cannot be prepared from bromoenzene. Discuss.

    Text Solution

    |

  11. Phenyl methyl ether (on anisole) reacts with HI to give phenol and met...

    Text Solution

    |

  12. Ethers have low solubility in water but high solubility in conc. H(2)S...

    Text Solution

    |

  13. Why is diethyl ether used as solvent in the prparation of Grignard rea...

    Text Solution

    |

  14. Sometimes explosionn occurs durring the distilliation of an ether Expl...

    Text Solution

    |

  15. Ethers are cleaved by acids and not by bases. Explain.

    Text Solution

    |

  16. 2,2-Dimethyloxirane can be cleaved by acid (H^(o+)). Write the mechani...

    Text Solution

    |

  17. Which of the following is the correct method for synthesising methyl-t...

    Text Solution

    |

  18. Which product is formed when is reacted with HI ?

    Text Solution

    |

  19. Complete the following : (CH(3))(3)CBr+alc.KOHrarr[A]overset(HOCI)...

    Text Solution

    |

  20. Give the necessary steps involved in the conversion of benzene to 1,2-...

    Text Solution

    |