Question

Which of the following exist as dimers in the anhydrous state and in nonpolar solvents?
(i) `AlF_(3)` , (ii) `AlCl_(3)`
(iii) `AlBr_(3)` , (iv) `AlI_(3)`
A. (ii), (iii)
B. (ii), (iii), (iv)
C. (i), (ii), (iii)
D. (i), (ii), (iii), (iv)

Answer 1

Correct Answer - A
Only `AlCl_(3)` and `AlBr_(3)` exists as dimers because `AlF_(3)` is not electron deficient as it is ionic consisting of `Al^(3+)` and `F^(-)` ions while `AlI_(3)` does not form dimer as `Al` cannot accommodate `4` large `I` atoms around it.