Which one of the following complexes shows optical isomerism ?
[Co(NH3)3Cl3]
cis[Co(en)2Cl2]Cl
trans[Co(en)2Cl2]Cl
[Co(NH3)4Cl2]Cl
(en=ethylenediamine)
As discussed in
These molecules are optically active having absence of plane of symmetry.
This molecule has absence of plane of symmetry and hence option 2 is correct.
Option 1)
[Co(NH3)3Cl3]
This option is incorrect.
Option 2)
cis[Co(en)2Cl2]Cl
This option is correct.
Option 3)
trans[Co(en)2Cl2]Cl
This option is incorrect.
Option 4)
[Co(NH3)4Cl2]Cl
(en=ethylenediamine)
This option is incorrect.