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Which of the following exist as dimers i...

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)

Text Solution

Verified by Experts

The correct Answer is:
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.
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