Question

Which one of the following has largest number of stereoisomers?

• A. $\left[Ru\right(N{H}_3{)}_{4}C{l}_2{]}^{+}$
• B. $\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2+}$
• C. $\left[Ir\right(P{h}_3{)}_{2}H\left(CO\right){]}^{2+}$
• D. $\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$

Answer 1

The correct option is D $\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$

A) It has two geometrical isomers i.e., cis and trans form and no optical isomer is possible in this case.
B) No geometrical or optical isomer is shown by this compound.
C) It has two geometrical isomers i.e., cis and trans form and no optical isomer is possible in this case.
D) It has two geometric (cis and trans form) and two optical isomers. The optical isomerism is possible for cis form only.