Question

The type of isomerism shown by the complex `[COCl_(2)(en)_(2)]` is
A. ionisation isomerism
B. coordination isomerism
C. geometrical isomerism
D. linkage isomerism

Answer 1

Correct Answer - C
Isomers in which the atoms or ligands occupy different positions around central metal/ion are called geometrical isomers. Complexes having coorination number of central atom/ion 6 with formula `M(A A)_(2)B_(2)` exhibit geometrical isomerism [where, AA is a bidentate ligand]. In `[CoCl_(2)("en")_(2)],[CoCl_(2)("en")_(2)]`, coordination number of Co is 6 with octahedral geometry.

Thus, `[CoCl_(2)("en")_(2)]` show geometrical isomerism.