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Coordination Complexes

The coordinat...

Question

The coordination numbers of $C o$ and $A l$ in $[C o (C l) (e n)_{2}] C l$ and $K_{3} [A l (C_{2} O_{4})_{3}]$ , respectively, are:
(en = ethane - 1, 2 - diamine)

3

and

3

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6

and

6

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5

and

6

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5

and

3

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Solution

The correct option is C $5$ and $6$
$e n$ and $C_{2} O_{4}^{2 -}$ are bidentate ligand and $C l^{-}$ is monodentate. So, coordination number of $[C o (C l) (e n)_{2}] C l$ is $(2 \times 2 + 1 =) 5$ and $K_{3} [A l (C_{2} O_{4})_{3}]$ is $(2 \times 3 =) 6$ .

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