Question

Select correct statement :

• A. Geometrical isomers of complexes may differ in dipole moment and visible / UV spectra
• B. Complexes of the type $\left[\text{Ma}_{3} \text{b}_{3}\right]$ can also have facial (fac) and meridional (mer) isomer
• C. No optical isomer exists for the complex trans - $\left[ Co ( en )_{2} Cl _{2}\right]^{+}$
• D. All are correct

Answer 1

Answer: (D)

Geometrical isomers of complexes may differ in dipole moment and visible / UV spectra.
Complexes of the type $\left[\text{Ma}_{3} \text{b}_{3}\right]$ can also have facial (fac) and meridional (mer) isomer which are wriiten below.

No optical isomer exists for the complex trans - $\left(\left[\text{Co} \left(\text{en}\right)_{2} \left(\text{Cl}\right)_{2}\right]\right)^{+}$ because plane of symmetry is present.