What is the hybridisation of carbon atom in C–X bond of vinylic halides

The hybridisation of the carbon atom in the C-X bond of vinylic halides is sp2.

Here's the step-by-step explanation:

1. Vinylic halides are compounds where the halogen atom (X) is bonded to a carbon atom that is doubly bonded to another carbon atom (C=C).

2. The carbon atom involved in the C-X bond forms three sigma bonds - one with the halogen atom and two with the other carbon atoms.

3. According to the valence bond theory, the number of sigma bonds formed by an atom is equal to its hybridisation state.

4. Therefore, since the carbon atom forms three sigma bonds, it is in the sp2 hybridisation state.

5. The remaining p orbital on the carbon atom forms a pi bond with the other carbon atom, resulting in the double bond (C=C).