Question

Which one of the following has the largest number of isomers?

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

Answer 1

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

$\left[Co\right(en{)}_{2}C{l}_2{]}^{+}$ gives both geometrical and optical isomers.