Coordination Compounds 2 Question 56

####58. Match the complexes in Column I with their properties listed in Column II.

$(2007,6 M)$

Column I Column II
(A) $\left[Co\left(NH _3\right) _4\left(H _2 O\right) _2\right] Cl _2$ p. Geometrical isomers
(B) $\left[Pt\left(NH _3\right) _2 Cl _2\right]$ q. Paramagnetic
(C) $\left[Co\left(H _2 O\right) _5 Cl\right] Cl$ r. Diamagnetic
(D) $\left[Ni\left(H _2 O\right) _6\right] Cl _2$ s. Metal ion with +2
oxidation state

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Solution:

  1. (A) $\left[Co\left(NH _3\right) _4\left(H _2 O\right) _2\right] Cl _2: Co^{2+}, 3 d^{7}$ show geometrical isomerism, paramagnetic.

(B) $Pt\left(NH _3\right) _2 Cl _2: Pt^{2+}$ has $d^{8}$-configuration with all paired electrons. Show geometrical isomerism, diamagnetic.

(C) $\left[Co\left(H _2 O\right) _5 Cl\right] Cl: Co^{2+}, 3 d^{7}$

Cannot show geometrical isomerism, paramagnetic.

(D) $\left[Ni\left(H _2 O\right) _6\right] Cl _2: Ni^{2+}, 3 d^{8}$, weak ligand, has two unpaired electrons. Paramagnetic but cannot show geometrical isomerism.



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