First slide

Stereo isomerism

Question

Geometrical isomerism is found in coordination compounds having coordination number:

Moderate

A

6
B

3
C

4 (tetrahedral)
D

2

Solution

Geometrical isomerism is found in compound having
coordination no. 4 (square planar and not tetrahedral shape)
as well as coordination no. 6
Coordination no. 4 (square planar) $M_{A_{2} BC}, M_{A_{2} B_{2}}$
Showing geometrical isomerism $M_{ABCD}$
Coordination no. 6 (octahedral) $M_{A_{4} B_{2}}, M_{A_{4} BC}$
Showing geometrical isomerism $M_{A_{3} B_{3}}, M_{{(AA)}_{2} B_{2}}$

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