Question

Which one of the following has an optical isomer?

• A. [Zn(en)(NH3)2]2+
• B. [Co(en)3]3+
• C. [Co(H2O)4(en)]3+
• D. [Zn(en)2]2+

Answer 1

Answer: (B)

$Co(en)3$3+

Answer 2

Complex [Co(en)3]3+ lacks plane of symmertry and thus is optically active having following to enantiomeric forms.