Question

Which of the following does not show optical isomerism?

• A. $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$
• B. $\left[Co\right(en\left)C{l}_2\right(N{H}_3{)}_2{]}^{+1}$
• C. $\left[Co\right(en{)}_3{]}^{3+}$
• D. $\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$

Answer 1

The correct option is A $\left[Co\right(N{H}_3{)}_{3}C{l}_3]$

Complexes of the type $M{A}_3{B}_3$ do not show optical isomerism but they show mer-fac isomerism.