Q. The structure of $[B e F_{4}]^{2 -}$ is

2587 220 NTA AbhyasNTA Abhyas 2020Chemical Bonding and Molecular Structure Report Error

A

tetrahedral

80%

B

octahedral

7%

C

square planar

9%

D

linear

5%

Solution:

The structure of $[B e F_{4}]^{2 -}$ is tetrahedral
The Be atom is $s p^{3}$ -hybridized.
Electronic structure of beryllium in $[B e F_{2}]$

[Two unpaired electrons form covalent bonds ( $σ$ -bonds) with two F atoms]
Electronic structure of beryllium in $[B e F_{4}]^{2 -}$

[Two $F^{-}$ ions, each donate an electron pair into empty $s p^{3}$ -hybrid orbital forming a coordinate bond].