NEET2019ChemistryCoordination CompoundsActual
Which one of the following complexes shows optical isomerism?
Options
- A[ Co ( NH ₃ )₃ Cl ₃ ]
- Bcis- [ Co (e n)₂ Cl ₂ ] Cl
- Ctrans- [ Co (e n)₂ Cl ₂ ] Cl
- Daligned & [ Co ( NH ₃ )₄ Cl ₂ ] Cl & (en= ethylenediamine) aligned
Correct answer
B. cis- [ Co (e n)₂ Cl ₂ ] Cl
Step-by-step solution
[ Co ( NH ₃ )₃ Cl ₃ ] has two geometrical isomers but both are optically inactive due to plane of symmetry. cis- [ Co (e n)₂ Cl ₂ ] Cl is optically active. Non -superimposable mirror images trans- [ Co (e n)₂ Cl ₂ ] Cl is optically inactive due to plane of symmetry. [ Co ( NH ₃ )₄ Cl ₂ ] Cl has two geometrical isomers but both are optically inactive due to plane of symmetry.