Consider the following complex $[C o {(N H_{3})}_{5} C O_{3}] C l O_{4}$ . The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal atom are respectively:

6, 3, 6, 0

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7, 2, 7, 1

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7, 1, 6, 4

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6, 2, 7, 3

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Solution

The correct option is B 6, 3, 6, 0
The electronic configuration of Co is $4 s^{2} 3 d^{7}$ with 2 electrons from the 4s orbital and 1 electron from the 3d orbital lost to the two negative entities $(C O_{3})^{- 2}$ and $(C l O_{4})^{- 1}$ thus, leaving Co with an oxidation number of +3. Moreover, there are 6 mono dentate ligands bonded with the remaining 6 electrons in the 3d orbital of Co and therefore, its coordination number is 6 with 0 unpaired d-electrons.

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Similar questions

Q. Consider the following complex,

[C o (N H_{3})_{5} C O_{3}] C l O_{4}

The coordination number, oxidation number, number of

d -

electrons and number of unpaired

d -

electrons on the metal are respectively:

Q. Show the coordination number of the metal ion, its oxidation number, the number of electrons in d-orbitals and the number of unpaired electrons in d-orbitals respectively in complex :

[C o {(H_{2} O)}_{4} {S O}_{3}] C l

Q. Consider the following complex:

[C o (C O_{3}) (N H_{3})_{5}] C l O_{4}

Mark the correct option:
Coordination no., Oxidation no., No. of d-electrons, unpaired d-electrons

Atomic number of Mn, Fe, Co and Ni are 25, 26, 27 and 28 respectively. Which of the following outer orbital octahedral complexes have same number of unpaired electrons?
(a) $[M n C l_{6}]^{3 -}$
(b) $[F e F_{6}]^{3 -}$
(c) $[C o F_{6}]^{- 3 -}$
(d) $[N i (N H_{3})_{6}]^{2 +}$

Q. The number of unpaired electrons in the complex ion

[C o F_{6}]^{3 -}

is:

[Atomic number of

C o = 27

]

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Consider the following complex [Co(NH3)5CO3]ClO4. The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal atom are respectively:

Consider the following complex $[C o {(N H_{3})}_{5} C O_{3}] C l O_{4}$ . The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal atom are respectively: