Question

Discuss the stereochemistry of the following molecules on the basis of hybridisation : PF5, SnCl2, NH3, CIF​

Answer 1

Answer:

PCl

5

: P(G.S)=1s

2

2s

2

2p

6

3s

2

3p

3

P(E.S)=1s

2

2s

2

2p

6

3s

1

3p

3

One s , three p & one d orbitals of same shell participate to give sp

3

d hybridisation.

Shape: Trigonal bipyramidal.

Figure-1 represents the shell diagram.

Figure-2 represents the shape .

NH

3

:N(G.S)=1s

2

2s

2

2p

3

N(E.S)=1s

2

One s , three p participate to give sp

3

hybridisation.

Shape: Pyramidal

Figure-3 represents the shell diagram.

Figure-4 represents the shape .

H

2

O:O(G.S)=1s

2

2s

2

2p

4

O(E.S)=1s

2

2s

2

2p

x

2

2p

y

1

2p

z

1

Two half filled sp

3

hybrid orbital of Oxygen atom & s orbital of 2 Hydrogen atom overlap to form water.

Shape: V-shaped or distorted tetrahedral due to lp−lp,lp−bp,bp−bp repulsion.

Figure-5 represents the shell diagram.

Figure-6 represents the shape .

SF

6

:1s

2

2s

2

2p

6

3s

2

3p

4

Hybridisation- sp

3

d

2

Shape: Octahedral.

Figure-7 represents the shell diagram.

Figure-8 represents the shape .