Question

Which of the following complexes shows geometrical isomerism?

• A. [Co(NH\textsubscript{3})\textsubscript{6}]\textsuperscript{3+}
• B. [Co(NH\textsubscript{3})\textsubscript{5}Cl]\textsuperscript{2+}
• C. [Co(NH\textsubscript{3})\textsubscript{4}Cl\textsubscript{2}]\textsuperscript{+}
• D. [Co(NH\textsubscript{3})\textsubscript{5}(ONO)]\textsuperscript{2+}

Hint:

Geometrical isomerism is typically observed in octahedral or square planar complexes with two or more different ligands.

Answer 1

The Correct Option is C

Coordination complexes exhibit geometrical isomerism when distinct ligands adopt varied spatial orientations around the central metal atom. For instance, in the complex [Co(NH\textsubscript{3})\textsubscript{4}Cl\textsubscript{2}]\textsuperscript{+}, the two chloride ligands can be positioned either adjacently (cis) or opposite each other (trans), leading to geometrical isomerism.