Question

In Q) 10.12 - ( i )

why does electron density near the C-Cl bond decreases with increase in electronegativity?

{ in chlorobenzene }

Answer 1

1. The C-Cl bond in chlorobenzene is shorter due to partial double bond character because of resonance. This makes bond shorter.
2. With increasing electronegativity of halogen, the size of atom atom decreases. Cl is more electronegative atom due to smaller in size.

The above two factros increases electron density between C-Cl bond.