Draw the structures of optical isomers of:
(i)[Cr(C2O4)3]3−
(ii)[PtCl2(en)2]2+
(iii)[Cr(NH3)2Cl2(en)]+-

Question

Draw the structures of optical isomers of:
(i)[Cr(C2O4)3]3− 
(ii)[PtCl2(en)2]2+
(iii)[Cr(NH3)2Cl2(en)]+-

Extramarks · Accepted Answer

It is the trans isomer of [CoCl2(en)2]+ and it is optically inactive as the mirror images are superimposable on each other.

cis-isomer is optically active as the mirror images are non-superimposable.
In total, three isomers are possible.
(ii) [Co(NH3)Cl(en)2]2+ :

Trans-isomer is optically inactive. 
Cis-isomers are optically active.

Trans-isomer is optically inactive. 
Cis-isomers are optically active. 
(iii) [Co(NH3)2Cl2(en)]+:

Total four isomers are possible....