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The complex which has no d-electron in t...

The complex which has no d-electron in the central metal atom is .

A

`[MnO_(4)]^(Θ)`

B

`[Co(NH_(3))_(6)]^(3+)`

C

`[Fe(CN)_(6)]^(3-)`

D

`[Cr(H_(2)O)_(6)]^(3+)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, "The complex which has no d-electron in the central metal atom is," we will analyze each complex provided in the options and determine the oxidation state of the central metal atom, as well as its electronic configuration. ### Step-by-Step Solution: 1. **Identify the complexes:** - The complexes given are: 1. MnO4^− 2. Co(NH3)6^3+ 3. Fe(CN)6^3− 4. Cr(H2O)6^3+ 2. **Analyze MnO4^−:** - Let the oxidation state of Mn be x. - The oxidation state of O is -2. Therefore, for 4 oxygen atoms, the total contribution is -8. - The equation becomes: \[ x + (-8) = -1 \implies x = +7 \] - The ground state electronic configuration of Mn (atomic number 25) is 3d^5 4s^2. - In the +7 oxidation state, Mn loses all its d and s electrons, resulting in no d-electrons. 3. **Analyze Co(NH3)6^3+:** - Let the oxidation state of Co be x. - NH3 is a neutral ligand, so it contributes 0. - The equation becomes: \[ x + 0 = +3 \implies x = +3 \] - The ground state electronic configuration of Co (atomic number 27) is 3d^7 4s^2. - In the +3 oxidation state, Co has the configuration 3d^6, meaning it has 6 d-electrons. 4. **Analyze Fe(CN)6^3−:** - Let the oxidation state of Fe be x. - CN^− has an oxidation state of -1, so for 6 CN ligands, the total contribution is -6. - The equation becomes: \[ x + (-6) = -3 \implies x = +3 \] - The ground state electronic configuration of Fe (atomic number 26) is 3d^6 4s^2. - In the +3 oxidation state, Fe has the configuration 3d^5, meaning it has 5 d-electrons. 5. **Analyze Cr(H2O)6^3+:** - Let the oxidation state of Cr be x. - H2O is a neutral ligand, contributing 0. - The equation becomes: \[ x + 0 = +3 \implies x = +3 \] - The ground state electronic configuration of Cr (atomic number 24) is 3d^5 4s^1. - In the +3 oxidation state, Cr has the configuration 3d^3, meaning it has 3 d-electrons. 6. **Conclusion:** - Among the complexes analyzed, only MnO4^− has a central metal atom (Mn) with no d-electrons in its +7 oxidation state. - Therefore, the correct answer is **MnO4^−**. ### Final Answer: The complex which has no d-electron in the central metal atom is **MnO4^−**.
To solve the question, "The complex which has no d-electron in the central metal atom is," we will analyze each complex provided in the options and determine the oxidation state of the central metal atom, as well as its electronic configuration. ### Step-by-Step Solution: 1. **Identify the complexes:** - The complexes given are: 1. MnO4^− 2. Co(NH3)6^3+ ...
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Knowledge Check

  • The complex ion which has no 'd'-electrons in the central metal atom is

    A
    `[MnO_(4)]^(-)`
    B
    `[Co(NH_(3))_(6)]^(3+)`
    C
    `[Fe(CN)_(6)]^(3-)`
    D
    `[Cr(H_(2)O)_(6)]^(3+)`

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