Question

How to convert Butan -1- ol to but -1-ene

Answer 1

Answer: Conversion for Ch₃-Ch₂-Ch₂-Ch₂ to Ch₃-Ch₂-Ch=Ch₂

                                                                  |

                                                                OH

Step 1: Darzen's Method:-

 Ch₃-Ch₂-Ch₂-Ch₂ + SOCl₂ ⇒ Ch₃-Ch₂-Ch₂-Ch₂

                          |                                                |

                        OH                                            Cl

Step 2: Dehydrohalogenation/Beta-Elimination Reaction:-

Ch₃-Ch₂-Ch₂-Ch₂ + KOH(alch.) ⇒ Ch₃-Ch₂-Ch=Ch₂ (But-1-ene)

                        |

                       Cl

Answer 2

Butan-1-ol can be converted into but-1-ene by following step of reactions -

(i) React butan-1-ol with SOCl$_{2}$ ,  1-chlorobutane is formed .

(ii) React 1-chlorobutane with alcoholic KOH , but-1-ene is formed .

• In the second step of the reaction , the elimination process is taking place .
• 1-Butene is used in the manufacturing process of linear low-density polyethylene (LLDPE) .
• 1-Butene gas is colourless and highly flammable in nature .