Question

The complex that exists as a pair of enantiomers is

• A. $trans-[ \left.Co \left( H _{2} NCH _{2} CH _{2} NH _{2}\right)_{2} CI _{2}\right]^{+}$
• B. $\left[ Co \left( H _{2} NCH _{2} CH _{2} NH _{2}\right)_{3}\right]^{3+}$
• C. $\left[ Pt \left( PPh _{3}\right)( CI )\left( Br \left( CH _{3}\right)\right]^{-}\right.$
• D. $cis -\left[ Co \left( NH _{3}\right)_{4} CI _{2}\right]^{+}$

Answer 1

Answer: (B)

$\left[ Co ( en )_{3}\right]^{3+}$, where, en $=\left( NH _{2} CH _{2} CH _{2} NH _{2}\right)$ The complex show optical isomerism, Optical isomers are mirror image that cannot be superimposed on one another. These are called as enantiomers. The molecules or ions that cannot be superimposed are called chiral.