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प्रश्न
Explain on the basis of valence bond theory that [Ni(CN)4]2− ion with square planar structure is diamagnetic and the [NiCl4]2− ion with tetrahedral geometry is paramagnetic.
Explain on the basis of valence bond theory, the experimental finding that [Ni(CN)4]2− ion with a square planar structure is diamagnetic and the [Ni(Cl)4]2− ion with tetrahedral geometry is paramagnetic.
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उत्तर
Nickel in [Ni(CN)4]2− is in the +2 oxidation state, i.e., nickel is present as Ni2+ ion. dsp2 hybrid orbitals.
| [Ni(CN)4]2− | Ni(28): 4s23d8 |
| Ni2+(28): 4s03d8 |
CN− is a strong field ligand, so it causes the pairing of electrons.
The strong ligand CN− facilitates electron pairing. The complex is diamagnetic because it contains no unpaired electrons.
In [NiCl4]2− the formation of the above complex can be explained by hybridization. Ni in the above compound is in the +2 oxidation state, i.e., Ni2+.
As Cl− is a weak ligand, pairing of electrons does not take place. sp3 hybridisation of orbitals takes place giving rise to tetrahedral geometry. As there are two unpaired electrons in the complex, it is paramagnetic.
It is paramagnetic due to the presence of unpaired electrons.
संबंधित प्रश्न
Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:
[Fe(CN)6]4−
Write the hybridisation and number of unpaired electrons in the complex `[CoF_6]^(3-)`. (Atomic No. of Co = 27)
[NiCl4]2- is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. Why? (Atomic no. Ni = 28)
Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[Mn(CN)6]^{3-}}\]
(i) Type of hybridisation.
(ii) Inner or outer orbital complex.
(iii) Magnetic behaviour.
(iv) Spin only magnetic moment value.
Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[Co(NH3)6]^{3+}}\]
(i) Type of hybridisation.
(ii) Inner or outer orbital complex.
(iii) Magnetic behaviour.
(iv) Spin only magnetic moment value.
Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[Cr(H2O)6]^{3+}}\]
(i) Type of hybridisation.
(ii) Inner or outer orbital complex.
(iii) Magnetic behaviour.
(iv) Spin only magnetic moment value.
In a coordination entity, the electronic configuration of the central metal ion is t2g3 eg1
Is the coordination compound a high spin or low spin complex?
How many radial nodes for 3p orbital?
Which of the statement given below is incorrect about H2O2?
Which of the following has square planar structures?
What is the no. of possible isomers for the octahedral complex [Co(NH3)2(C2O4)2]?
In Fe(CO)5, the Fe – C bond possesses
Using Valence bond theory, explain the following in relation to the paramagnetic complex [Mn(CN)6]3−
- type of hybridization
- magnetic moment value
- type of complex – inner, outer orbital complex
Using valence bond theory, predict the hybridization and magnetic character of the following:
[CoF6]3– [Atomic number of Co = 27]
According to the valence bond theory, the hybridization of central metal atom is dsp2 for which one of the following compounds?
The magnetic moment of [NiCl4]2− is ______.
[Atomic number: Ni = 28]
During chemistry class, a teacher wrote \[\ce{[Ni(CN)4]^2-}\] as a coordination complex ion on the board. The students were asked to find out the magnetic behaviour and shape of the complex. Pari, a student, wrote the answer paramagnetic and tetrahedral whereas another student Suhail wrote diamagnetic and square planer.
Evaluate Pari’s and Suhail’s responses.
