Question

The complex that shows Facial - Meridional isomerism is:

• A. \( [Co(NH_3)_3Cl_3] \)
• B. \( [Co(NH_3)_4Cl_2]^+ \)
• C. \( [Co(en)_3]^{3+} \)
• D. \( [Co(en)_2Cl_2]^+ \)

Hint:

Facial and meridional isomerism occur in octahedral complexes where ligands are arranged in distinct ways, resulting in different spatial orientations of ligands.

Answer 1

The Correct Option is A

Ma\(_3\)b\(_3\) type complexes show Facial - Meridional isomerism. The isomerism depends on the arrangement of ligands. 
\( [Co(NH_3)_3Cl_3] \) forms Ma\(_3\)b\(_3\) isomerism. 
\( [Co(NH_3)_4Cl_2]^+ \) forms Ma\(_4\)b\(_2\). 
\( [Co(en)_3]^{3+} \) forms M(AA)\(_3\). 
\( [Co(en)_2Cl_2]^+ \) forms M(AA)\(_2\)b\(_2\).
Thus, the correct answer is \( [Co(NH_3)_3Cl_3] \), which forms Ma\(_3\)b\(_3\) type complex and shows Facial-Meridional isomerism.