Question

Which of the following complex species is not expected to exhibit optical isomerism?

• A. $\lbrack Co(en)(NH_{3})_{2}Cl_{2}\rbrack^{+}$
• B. $\lbrack Co(en)_{3}\rbrack^{3 +}$
• C. $\lbrack Co(en)_{2}Cl_{2}\rbrack^{+}$
• D. $\lbrack Co(NH_{3})_{3}Cl_{3}\rbrack$

Answer 1

Answer: (D)

$\lbrack Co(NH_{3})_{3}Cl_{3}\rbrack$

Answer 2

$\lbrack Co(NH_{3})_{2}Cl_{3}\rbrack$ Will not exhibit optical isomerism due to presence of plane of symmetry.