These are the compounds in which the halogen atom is bonded to ansp3-hybridised carbon atom adjacent to carbon-carbon double bond(C=C) i.e. to an allylic carbon

To identify the compounds in which the halogen atom is bonded to an sp3-hybridized carbon atom adjacent to a carbon-carbon double bond (C=C), also known as an allylic carbon, we need to follow these steps:

Step 1: Identify the allylic carbon Look for a carbon atom that is directly bonded to a carbon-carbon double bond (C=C). This carbon atom is called the allylic carbon.

Step 2: Determine the hybridization of the allylic carbon Check the hybridization of the allylic carbon. It should be sp3-hybridized, meaning it has four sigma bonds and no pi bonds.

Step 3: Locate the halogen atom Find the halogen atom that is directly bonded to the allylic carbon. This halogen atom could be fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).

Step 4: Identify the compounds Based on the above criteria, the compounds that fit the description are those in which the halogen atom is bonded to an sp3-hybridized carbon atom adjacent to a carbon-carbon double bond (C=C), or an allylic carbon.

By following these steps, you can identify the compounds in which the halogen atom is bonded to an sp3-hybridized carbon atom adjacent to a carbon-carbon double bond (C=C), or an allylic carbon.