Question

How alcl3 is more stable than tlcl3

Answer 1

On moving down the group 13, the +1 state is more stable in comparison to +3 oxidation state. This is due to inert pair effect. ... Hence, the first element Boron shows a +3 O.S in BCl3 and becomes stable while the last element of the group Thallium (Tl) does not show a stable +3 oxidation state

Answer 2

Answer:

AlCl₃ is more stable than TlCl₃ due to inert pair effect.

Explanation:

As we move down the group in the periodic table, tendency to participate in bonding starts decreases for the electron in the s-orbital of valence shell. As we know that, both Al and Tl (group 13) has only three electron in their valence shell.

• For Al, all three electron participate in bonding. So, +3 oxidation state is stable, which leads to formation of stable AlCl₃.

• For Tl, +1 oxidation state is more stable because of inert pair effect.

Therefore, AlCl₃ is more stable than TlCl₃.