Compound [ Co ( en ) 2 ( NO 2 ) Cl ] SCN has :

Question

Compound [ Co ( en ) 2 ​ ( NO 2 ​ ) Cl ] SCN has :

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Explain Question:

The question asks to identify the correct type and number of isomers that the coordination compound $[C o (e n)_{2} (N O_{2}) Cl] SCN$ can exhibit.

Concept: Isomerism in Coordination Compounds, Geometrical Isomerism, Linkage Isomerism, Ionization Isomerism, Optical Isomerism.

Solution:

The complex is of the type $[M (AA)_{2} BC] D$ , where AA is a symmetrical bidentate ligand (en, which stands for ethylenediamine).

Ionization isomers:

$[C o (e n)_{2} (N O_{2}) Cl] SCN$

$[C o (e n)_{2} (N O_{2}) (SCN)] Cl$

$[C o (e n)_{2} Cl (SCN)] N O_{2}$

Linkage isomers:

$[C o (e n)_{2} (N O_{2}) Cl] SCN$

$[C o (e n)_{2} (ONO) Cl] SCN$

Geometrical isomers:

Total 3 stereoisomer.

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