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प्रश्न
Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:
[CoF6]3−
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उत्तर
Co(27) = [Ar] 3d74s2
Co3+ = [Ar] 3d64s0
F− being a weak field ligand cannot pair electrons.
The oxidation state of cobalt in the complex is +3. Its electronic configuration is [Ar] 3d6. F− ion provides a weak ligand field and is unable to pair up the unpaired electrons of the 3d orbitals.
Hence, six equivalent hybrid orbitals are obtained by mixing of one 4s, three 4p and two 4d orbitals. Six empty sp3d2 hybrid orbitals are filled up by six electron pairs provided by F− ion. The highly paramagnetic nature of the complex further confirms the presence of four unpaired electrons.
As d-orbitals of the outermost shell participate in hybridisation, the complexes thus formed are called outer orbital complexes.
Hence, [CoF6]3− is a paramagnetic and octahedral complex.
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Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:
[FeF6]3−
Write the hybridisation and number of unpaired electrons in the complex `[CoF_6]^(3-)`. (Atomic No. of Co = 27)
Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[Cr(H2O)6]^{3+}}\]
(i) Type of hybridisation.
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Using valence bond theory, explain the following in relation to the complexes given below:
\[\ce{[FeCl6]^{4-}}\]
(i) Type of hybridisation.
(ii) Inner or outer orbital complex.
(iii) Magnetic behaviour.
(iv) Spin only magnetic moment value.
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Write the hybridization and shape of the following complexes:
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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?
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Evaluate Pari’s and Suhail’s responses.
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Choose the correct answer from the options given below:
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Statement I: Both [Co(NH3)6]3+ and [CoF6]3− complexes are octahedral but differ in their magnetic behavior.
Statement II: [Co(NH3)6]3+ is diamagnetic whereas [CoF6]3− is paramagnetic.
In the light of the above statements, Choose the correct answer form the options given below:
