Question

Which of the following does not show optical isomerism?
(en = ethylenediamine)

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

Answer 1

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


(a) The compound contains bidentate ligands and is optically active.


(b) Cis isomer of the compound is optically active.


(c) Both isomers (fac- and mer-) contain plane of symmetry and are optically inactive.


(d) Cis isomer of the compound is optically active.


The coordination compound containing bidentate ligand is generally optically active.