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Coordination Compounds

Short Answer Type

281. Explain the geometry of Ni(CO)₄ by valence bond theory. Why is this molecule diamagnetic? (Atomic number of Ni = 28).

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282.

Using valency bond approach predict the shape and magnetism (paramagnetic or diamagnetic) of [Ni(CN)₄]^–.

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283. Using valence bond approach, predict the shape and magnetism (paramagnetic or diamagnetic) of [Ni(CO)₄].

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284.

Explain the following terms: (i) Inner orbital complex and (ii) outer orbital complex.

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285.
What is meant by stability constant of a complex?

The stability of a complex in solution refers to the degree of association between the two species involved in the state of equilibrium. The magnitude of the equilibrium constant for the association, quantitatively expresses the stability.

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286.

Define cis-trans isomerism. Draw the cis and trans isomers of [Co(NH₃)₃Cl₃) ion.

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287.

Deduce the structures of [NiCl₄]^2– and [Ni(CN)₄]^2– considering the hybridization of the metal ion. Calculate the magnetic moment (spin only) of the species.

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Long Answer Type

288. Describe briefly the nature of bonding in metal carbonyls.

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289.

Illustrate with an example each of the following terms: (i) Ionization isomerism, (ii) coordination isomerism, (iii) Linkage isomerism, (iv) Geometrical isomerism (v) Optical isomerism.

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