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The exhibition of highest coordination n...

The exhibition of highest coordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in `MF_(6)^(3-)` ?

A

B

B

AI

C

Ga

D

In

Text Solution

Verified by Experts

The correct Answer is:
A
Due to non-availability of d-orbitals boron is restricted to a maximum covalence of four (using 2s three 2p orbitals) while others (AI,Ga,In) can expand their covalence above four by using their 3d orbitals. Thus B forms only `[BF_(4)]^(-)` and other form `[MF_(6)]^(3-)`
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