Question

Three pairs of compounds are given below, identify that compound in each of the paris which has group 13 element in more stable oxidation state. Give reson for your choice.
(i) `TiCl_(3).TICl` (ii) `AlCl_(3).AlCl` (iii) `InCl_(3).InCl`

Answer 1

This is explained on the bais of inert pair inert pair effect . Memebers of group 13 have tendency to exhibit both, 1+1 and +3 states the stability of +3 oxidation state decreases down the group while that of +1 oxidisation state increase. On this basis.
(i) TICI is more stable than `TICl_(3)` (+1 oxidations taet is more stable than +3 oxidations state)
(ii) `AlCl_(3)` is more stable than AlCl (+3 oxidisation stable than +1 oxidation state)
(ii) InCl is more stable than `InCl_(3)` (+1 oxidation is more stable +3 oxidation state)