Question

Explain sterroisomerism in metal complexes with coordination number 4 and 6.

Answer 1

Coordination numbers refer to thenumber of ligands or atoms bound to the central atom. Thus, linear has acoordination number of 2 because it consists of 2 atoms bound to the central atom. Square planar and tetrahedral have a coordination number of 4 while octahedral has acoordination number of 6.
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Answer 2

Explanation:

1. Geometrical isomerism exists in heteroleptic complexes due to different possible three diamensional spatial arrangements of the ligands around the central metal atom. This type of isomerism exist in square planar tetrahedral complexes.

2. In square planar complexes of the form [MA2B2]n± and [MA2BC]N+ where A, B and C are monodentate ligands and M is the central metal ion / atom.

3. Similar groups (A or B) present either on same side or on the opposite side of the central metal atom (M) give rise to two different geometrial isomers and they are called cis and trans isomers respectively.