Question

Which of the following molecular species/compound is not hypovalent?

• A. $C{H}_3^{+}$
• B. $B_2{H}_6$
• C. $N{H}_2^{+}$
• D. $Al{F}_3$

Answer 1

The correct option is D $Al{F}_3$

Those species which have the central atom with less than eight electrons in the outermost shell or valence shell are considered as hypovalent species.

Electronic configuration of :

Al - 2,8,3

We can see in the figure,

In $Al{F}_3$, central element (Al) is in Al(+3) state. So its configuration is

Al(+3) - 2,8

Since there are 8 electrons remaining in the valence shell of the central atom in $Al{F}_3$. So, $Al{F}_3$ is not “Hypervalent”.

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