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 - ${\left[Co(en{)}_{2}C{l}_2\right]}^{+}$
• 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.