Question

Which of the following is electron deficient?

1. BeCl2
2. HCl
3.NH3
4. H2O​

Answer 1

Explanation:

Refer to Image 1)

In Diborane structure, each Boron bonds with 4 hydrogen atoms. But Boron valency is 3. Each Boron gives 3 valence electrons but for the 4

th

bond, there is no electron from Boron side which makes it electron deficient.

(Refer to Image 2)

In AlCl

3

, Al atom bonds with 3 Cl atoms. But here it violates octet rule. There are no bonds or lone pairs, which makes the surrounding electron count 8. It has only 3 bonds which makes 6 electrons. So, it is an electron deficient compound. So, both AlCl

3

and B

2

H

6

are electron deficient compounds.

Answer 2

answer

NH3

Explanation:

because ammonia is electron deficient