Prop-1-ene reacts with Cl₂ in an addition reaction - HSC - SSCE Chemistry - Question 21 - 2022 - Paper 1

To draw the product of the reaction between prop-1-ene and chlorine, we need to illustrate the addition of a chlorine atom to one of the double-bonded carbons. The double bond between the first and second carbon atom is broken, allowing a chlorine atom to bond with one of the carbons while the second carbon will still retain a hydrogen atom. The resulting structure should include a chlorine atom bonded to the first carbon, as shown below:

      H       Cl
      |       |
  H – C – C – C – H
      |       |
      H       H

This structural formula includes the necessary addition of at least one chlorine atom, fulfilling the criteria of the question.