Among the following the maximum convalent character is shown by the compound

Options

A. `FeCI_(2)`
B. `SnCI_(2)`
C. `AlCI_(3)`
D. `MgCI_(2)`

Answer

C

Explanation

Covalent character is favoured by Fajans' rule
(i) Larger the charge on the ion
(ii) Smaller the size of cations.
(iii) Larger the size of anions.
(iv) Cation with 18-electron structure (e.g., `Cu^(+)`). Then larger the polarizing power and the covalent character is favoured.
In all the given compound s, anion is same `(CI^(-))`, hence polarizing power is decided by size and charge of cation .
`AI^(3+)` with maximum charge and smallest size has maximum power hence. `AICI_(3)` has maximum covalent character.