1. Tardigrade
  2. Question
  3. Chemistry
  4. How many of the following are optically inactive? i. trans- [ Co ( en )2( NH 3) Cl ]2+ ii. cis- [ Co ( en )2 Br 2]+ iii. cis- [ Co ( NH 3)3 Cl 3] iv. trans- [ Co ( NH 3)4 Cl 2]+ v. trans- [ CoCl 2( C 2 O 4)2]3-

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Q. How many of the following are optically inactive?
i. trans- $\left[ Co ( en )_{2}\left( NH _{3}\right) Cl \right]^{2+}$
ii. cis- $\left[ Co ( en )_{2} Br _{2}\right]^{+}$
iii. cis- $\left[ Co \left( NH _{3}\right)_{3} Cl _{3}\right]$
iv. trans- $\left[ Co \left( NH _{3}\right)_{4} Cl _{2}\right]^{+}$
v. trans- $\left[ CoCl _{2}\left( C _{2} O _{4}\right)_{2}\right]^{3-}$

Coordination Compounds

Solution:

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