MCQ
The complex that shows Facial - Meridional isomerism is
  • $\left[ Co \left( NH _3\right)_3 Cl _3\right]$
  • B
    $\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+}$
  • C
    $\left[ Co ( en )_3\right]^{3+}$
  • D
    $\left[ Co ( en )_2 Cl _2\right]^{+}$

Answer

Correct option: A.
$\left[ Co \left( NH _3\right)_3 Cl _3\right]$
(A)
$Ma _3 b_3$ type complexes show Facial - Meridional isomerism
(i) $\left[ Co \left( NH _3\right)_3 Cl _3\right] \Rightarrow Ma _3 b_3$
(ii) $\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+} \Rightarrow Ma _4 b_2$
(iii) $\left[ Co ( en )_3\right]^{3+} \Rightarrow M ( AA )_3$
(iv) $\left[ Co ( en )_2 Cl _2\right]^{+} \Rightarrow M ( AA )_2 b_2$
$a , b ,= NH _3, Cl ^{-}$
$AA = en$

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