Question

Which one of the following complexes shows optical isomerism? (en = ethylenediamine)

विकल्प

• [Co(NH₃)₃Cl₃]

• cis[Co(en)₂Cl₂]Cl

• trans[Co(en)₂Cl₂]Cl

• [Co(NH₃)₄Cl₂]Cl

Answer 1

cis[Co(en)₂Cl₂]Cl

Explanation:

The trans isomer of [Co(en)₂Cl₂]⁺ contains a plane of symmetry and is optically inactive, whereas the cis isomer does not.