Home
Class 12
CHEMISTRY
The hexaaquamanganese(II)ion contains fi...

The hexaaquamanganese(II)ion contains five unpaired electrons,while the hexacyano ion contains only one unpaired electron.Explain using crystal field theory.

Text Solution

Verified by Experts

i/*. Óctahedral complexes with .d^3. to .dotd^7. configura: tion cain give rise to either high or low spin magnetic properties. Mn (II) has.a .d^ f . configuration. In a weak octahedral crystal field this splits to give .t_2 g^3. but in a strong crystal freld it givesit .g^5-e g o .(H_2 O.. is weak ficld liganid and .CN^-. is strong fịeld ligand) .In. the first.case noo pairing of electrons occurs. but in the, second case two pairs of electrons are. present leaving only.one unpaired electron.
Promotional Banner

Topper's Solved these Questions

  • CHEMISTRY IN EVERYDAY LIFE

    V PUBLICATION|Exercise QUESTION BANK|74 Videos

  • ELECTROCHEMISTRY

    V PUBLICATION|Exercise QUESTION BANK|154 Videos

Similar Questions

Explore conceptually related problems

On the basis of crystal field theory, explain why [Mn(H_2O)_6]^(2+) contains five unpaired electrons while [Mn(CN)_6)^(4-) contains oNiy one unpaired electron.

An element has one electron in the 'M' shell. Indicate the number of unpaired electrons in its unipositive ion.

When Hg_2 Cl_2 , ionizes, the ions produced and the unpaired electrons present on the cation respectively are

Predict the number of unpaired electrons in the squar planar [Pt(CN)_4]^(2-) ion.

How many unpaired electrons are present in the central metal ion of [CoCl_4]^(2-) ?

Presence of unpaired electrons makes a species paramagnetic. Each unpaired electron has a magnetic moment associated with its spin angular momentum and orbital angular momentum. For the compounds of the first series of transition metals, the contribution of the orbital angular momentum is effectively quenched and hence is considerably important. For these, the magnetic moment is determined by the number of unpaired electrons and is calculated by using the spin-only formula, i.e., mu = sqrt(n(n+2)) where n=number of unpaired electrons and mu =magnetic momentin (in Bohr magneton, B.M.). If n=1, then mu = 1.73 B.M . Which one of the following transition metal ions is paramagnetic?

Presence of unpaired electrons makes a species paramagnetic. Each unpaired electron has a magnetic moment associated with its spin angular momentum and orbital angular momentum. For the compounds of the first series of transition metals, the contribution of the orbital angular momentum is effectively quenched and hence is considerably important. For these, the magnetic moment is determined by the number of unpaired electrons and is calculated by using the spin-only formula, i.e., mu = sqrt(n(n+2)) where n=number of unpaired electrons and mu =magnetic momentin (in Bohr magneton, B.M.). If n=1, then mu = 1.73 B.M . The magnetic moment of a transition metal ion is found to be 3.87 B.M. The number of unpaired electrons present in it is:

V PUBLICATION-COORDINATION COMPOUNDS-QUESTION BANK
  1. [Co(NH3)6]^3+ is an inner orbital complex whereas [Ni(NH3)6]^(2+) is a...

    Text Solution

    |

  2. Predict the number of unpaired electrons in the squar planar [Pt(CN)4]...

    Text Solution

    |

  3. The hexaaquamanganese(II)ion contains five unpaired electrons,while th...

    Text Solution

    |

  4. Calculate the overall complex dissociation equillibrium constant for t...

    Text Solution

    |

  5. Explain the bonding in coordination compounds in terms of Werner's pos...

    Text Solution

    |

  6. FeSO4 solution mixed with '(NH4)2 SO4' solution in 1 : 1 molar ratio g...

    Text Solution

    |

  7. Explain with two examplés each of the following coordination entity, l...

    Text Solution

    |

  8. What is meant by unidentate, didentate and ambidentate ligands? Give t...

    Text Solution

    |

  9. Specify the ox:dation numbers of the metals in the following coordinat...

    Text Solution

    |

  10. Using IUPAC norms write the formulae for the following : i) Tetrahydro...

    Text Solution

    |

  11. Using IUPAC norms write the systematic names of the following : viii)...

    Text Solution

    |

  12. List various types of isomerism possible. for coordination compounds, ...

    Text Solution

    |

  13. How many geometrical isomers are possible in the following coordinatio...

    Text Solution

    |

  14. Draw the structure of optical isomers of? i) '[Cr(C2O4)3]3-

    Text Solution

    |

  15. Draw all the isomers (geometrical and optical) of: i) [CoCl2(en)2]^+ i...

    Text Solution

    |

  16. Write all the geometrical isomers of [Pt(NH3)(Br)(Cl) (Py)]and how man...

    Text Solution

    |

  17. 1.Aqueous copper sulphate solution (blue in colour) gives i) a green p...

    Text Solution

    |

  18. What is the coordination entity formed when excess of aquéous KCN, iș ...

    Text Solution

    |

  19. Discuss the nature of bonding in the following coordination entities o...

    Text Solution

    |

  20. Draw the figure to show the splitting of d-orbitals in an octahedral c...

    Text Solution

    |