List of top Chemistry Questions on Bonding in Coordination Compounds asked in CBSE Class XII

Write the oxidation state and hybridisation of the central metal in the following complex : \[ [Fe(H_2O)_6]^{3+} \] [Atomic number of Fe = 26]

Answer the following questions about the complexes \[ [NiCl_4]^{2-} \quad \text{and} \quad [Ni(CN)_4]^{2-} \] (i) Write the hybridization involved in each case. (ii) Which of them is the inner orbital complex and which one is the outer orbital complex ? (iii) Compare their magnetic behaviour. (Atomic Number of Ni = 28)

Answer the following questions about the complexes \([NiCl_4]^{2-}\) and \([Ni(CN)_4]^{2-}\): \[ (i)\;\text{Write the hybridization involved in each case.} \] \[ (ii)\;\text{Which of them is the inner orbital complex and which one is the outer orbital complex?} \] \[ (iii)\;\text{Compare their magnetic behaviour.} \] \[ \text{Atomic number: }Ni=28 \]

The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometry of coordination compounds. The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges), on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields.

Why are low spin tetrahedral complexes rarely formed ?

Answer the following questions about the complexes $\mathrm{[NiCl_4]^{2-}}$ and $\mathrm{[Ni(CN)_4]^{2-}}$ :
(i) Write the hybridization involved in each case.
(ii) Which of them is the inner orbital complex and which one is the outer orbital complex ?
(iii) Compare their magnetic behaviour. [Atomic number : Ni = 28]