Home
Class 12
CHEMISTRY
Williamson synthesis is an important met...

Williamson synthesis is an important method for the preparation of symmetrical and unsymmetrical ether. In this method halide is allowed to react with alcohol in presence of Na or K metal.
`R-OH+R'-Xoverset(Na or K)rarrR-O-R'`

`3^(@)` halides and aromatic halides no not give this reaction.

Find out A and B :

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • HALIDES

    HIMANSHU PANDEY|Exercise Linked Comprehension Type (Q.26 To Q.27)|2 Videos

  • HALIDES

    HIMANSHU PANDEY|Exercise Match The Column|13 Videos

  • HALIDES

    HIMANSHU PANDEY|Exercise More Than One Correct (Q.26 To Q.50)|25 Videos

  • GENERAL ORGANIC CHEMISTRY

    HIMANSHU PANDEY|Exercise Subjective Type Problems|19 Videos

  • ISOMERISM

    HIMANSHU PANDEY|Exercise Subjective Type Problems|11 Videos

Similar Questions

Explore conceptually related problems

Alkane may be prepared from alkyl hlide by Wutrtz method where alkyl halide reacted with Na in prresence of ether 2R-X overset("Ether")underset(Delta)rarr R-R+2NaX . Mechanish: Which of the folowing compounds is most reactive for Wurtz reaction?

Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Methyl tertiary butyl ether (MTBE) is added in gasoline to improve its octane number . CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-O-CH_(3) Which of the following is the best method for synthesis of the above ether ?

Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction To which of the following mechanisms does the reaction ( Williamson's ether synthesis ) belong ?

Assertion (A)Wurtz reaction is more suitable for the synthesis of symmetrical alkanes. Reason(R )When two different alkyl halides are treated with sodium metal in dry ether. A mixture of non-separable alkanes is obtained.

Alexander Williamson prepared diethyl by a simple method, now called as Williamson's ether synthesis . In this method, an alkyl halide is treated with sodium alkoxide prepared from sodium and alcohol. This reaction is used in the synthesis of symmetrical and unsymmetrical ethers. It may be noted taht for preparing unsymmetrical ethers, the halide used should preferably be primary because secondary and tertiary alkyl halides may form alkenes as major product due to elimination process. CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+underset("Sodium ethoxide")(Na^(+)O^(-)-C_(2)H_(5))rarrunderset("2-methylpropene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2))+C_(2)H_(5)OH+NaBr Aryl ethers or phenolic ethers can be prepared by using sodium phenoxide and alkyl halides. However, aryl halides and sodium alkoxide cannot be used for preparing phenolic ethers because aryl halides are less reactive towards nucleophilic substitution reaction Arrange the following halides in decreasing order of reactivity towards Williamson's ether synthesis : underset((u))(CH_(3)CH_(2)CH_(2)Cl)," "underset((v))(CH_(3)CH_(2)CH_(2)Br), underset((w))((CH_(3))_(3)C-CH_(2)Br)," "underset((x))(H_(2)C=CH-CH_(2)Cl)

HIMANSHU PANDEY-HALIDES-Linked Comprehension Type (Q.1 To Q.25)
  1. R-X+Mgoverset(Ether,Delta)rarroverset(delta-)R-overset(delta+)Mg-X Gri...

    Text Solution

    |

  2. Since, Grignard reagents resemble carbanion, so they are strong nucleo...

    Text Solution

    |

  3. Since, Grignard reagents resemble carbanion, so they are strong nucleo...

    Text Solution

    |

  4. Since, Grignard reagents resemble carbanion, so they are strong nucleo...

    Text Solution

    |

  5. Consider the following sequence of reaction. Find structure of co...

    Text Solution

    |

  6. Consider the following sequence of reaction. Find structure of co...

    Text Solution

    |

  7. Consider the following sequence of reaction. Coverset(CF(3)CO(3)H...

    Text Solution

    |

  8. Williamson synthesis is an important method for the preparation of sym...

    Text Solution

    |

  9. Williamson synthesis is an important method for the preparation of sym...

    Text Solution

    |

  10. Williamson synthesis is an important method for the preparation of sym...

    Text Solution

    |

  11. Aliphatic nucleophilic substitution is mainly of two type S(N^(1))" an...

    Text Solution

    |

  12. Aliphatic nucleophilic substitution is mainly of two type S(N^(1))" an...

    Text Solution

    |

  13. Aliphatic nucleophilic substitution is mainly of two type S(N^(1))" an...

    Text Solution

    |

  14. Type of elimination reaction in which least substituted alkene is majo...

    Text Solution

    |

  15. Type of elimination reaction in which least substituted alkene is majo...

    Text Solution

    |

  16. Type of elimination reaction in which least substituted alkene is majo...

    Text Solution

    |

  17. There are number of organic compounds including esters, xanthate ester...

    Text Solution

    |

  18. There are number of organic compounds including esters, xanthate ester...

    Text Solution

    |

  19. There are number of organic compounds including esters, xanthate ester...

    Text Solution

    |

  20. Which one of the following is correct structure of 'B'?

    Text Solution

    |