How many of the following are optically inactive?
i.trans $- [Co (en)_{2} (NH_{3}) Cl]^{2 +}$
ii.cis $- [Co (e n)_{2} Br_{2}]^{+}$
iii. $[Co (NH_{3})_{3} Cl_{3}]$
iv.trans $- [Co (NH_{3})_{4} Cl_{2}]^{+}$
v.trans $- [CoCl_{2} (C_{2} O_{4})_{2}]^{3 -}$

Question

How many of the following are optically inactive?

i.trans $- [Co (en)_{2} (NH_{3}) Cl]^{2 +}$

ii.cis $- [Co (e n)_{2} Br_{2}]^{+}$

iii. $[Co (NH_{3})_{3} Cl_{3}]$

iv.trans $- [Co (NH_{3})_{4} Cl_{2}]^{+}$

v.trans $- [CoCl_{2} (C_{2} O_{4})_{2}]^{3 -}$

TestHub · Accepted Answer

Complexes (i), (iii), (iv) and (v) are optically inactive due to the presence of plane of symmetry.

Chemistry - Coordination Chemistry Question with Solution | TestHub