Coordination Compounds 2 Question 15

####17. Match the metals (Column I) with the coordination compound(s)/enzyme(s) (Column II).

(2019 Main, 11 Jan I)

Column I Col Imn II
(A) $Co$ (i) Wilkinson catalyst
(B) $Zn$ (ii Chlorophyll
(C) $Rh$ (iii) Vitamin $B _{12}$
(D) $Mg$ (iv) Carbonic anhydrase
(a) (i) (ii) (iii) (iv)
(b) (iv) (iii) (i) (ii)
(c) (iii) (iv) (i) (ii)
(d) (ii) (i) (iv) (iii)
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Answer:

Correct Answer: 17. (c)

Solution:

  1. (A) Co is present in vitamin $B _{12}$ (iii) having molecular formula,

$$ C _{63} H _{88} \stackrel{\text { II }}{CoN _{14}} O _{14} P . $$

(B) $Zn$ is present in carbonic anhydrase (iv) in which three histidine units and the $-OH$ group coordinate with one $Zn$ (II) ion.

(C) $Rh$ is present in Wilkinson catalyst (i) having molecular formula $\left[\left(Ph _3 P\right) _3 RhCl\right]$.

(D) $Mg$ is present in chlorophyll (ii) having molecular formula $C _{55} H _{70} O _6 N _4 \stackrel{\text { II }}{Mg}$ (chlorophyll-b).



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