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Coordination Compounds

Short Answer Type

71. What is Wilkinson’s catalyst? Where is it used?

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72.

Write the IUPAC name of [Ni(CN)₄]^2– ion?

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73. Nickel carbonyl( NiCO₄) has tetrahedral geometry whereas [Pt(NH₃)₂Cl₂] is square planar.

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74.

Write the expression for the stability’ constant for [Cu(NH₃)₄]²⁺.

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75.

The value of equilibrium constants of [Cu(NH₃)₄]⁺ and [Co(NH₃)₆]³⁺ are 1.0 x 10^–12 and 6.2 x 10^–36 respectively. Which complex would be more stable and why ?

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76.

In octahedral complexes which two d-orbitals are used in hybridization.

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77.
If the value of Δ₀ is less than P in the crystal field, write the arrangement of d⁴coordination entity in crystal field split.

If Δ₀ < P, the weak field and high spin situation is present, thus no pairing will occur in t_2g orbitals. Hence the configuration of d⁴ entity will be t_2g³ e_g¹

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78.

How is ammonia molecule is a good ligand?

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79.

What do you understand by the term stability constant K for a complex?

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80. There are two compounds [Cr(NH₃)₄]²⁺ and [Cr(CN)₄]^2– having 5.2 x 10¹¹ and 3.2 x 10²² respectively as their K values, which complex is more stable and which ligand NH₃or CN^– is a stronger ligand?

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Short Answer Type

77. If the value of Δ0 is less than P in the crystal field, write the arrangement of d4coordination entity in crystal field split.

77.
If the value of Δ₀ is less than P in the crystal field, write the arrangement of d⁴coordination entity in crystal field split.