List of top Chemistry Questions on Coordination Compounds asked in UP Board XII

(i) Write the IUPAC name of the following coordination compounds: (a) K3[Cr(C2O4)3] (b) [Co(NH3)5(CO3)]Cl. (ii) Write the electronic configuration of the following: (a) Cr3+ (b) Cu.
Explain the type of isomerism shown by the following complexes and give the structure of the isomers:
(i) \([\text{Co(NH}_3)_5(\text{NO}_2)](\text{NO}_3)_2\)
(ii) \([\text{Cr(NH}_3)_6][\text{Co(CN)}_6]\)
(iii) \([\text{Fe(NH}_3)_2(\text{CN})_4]^-\)
Draw a diagram to show the splitting of d-orbitals in an octahedral crystal field.
Discuss the chelate effect with an example. Explain the nature of bonding in \( [\text{Fe}(\text{CN})_6]^{4-} \) on the basis of valence bond theory. (2+2=4)
Write the IUPAC names of the following coordination compounds.
(i) \( [Cr(NH_3)_2Cl_2(en)]Cl \)
(ii) \( [Pt(NH_3)_4Cl_2][PtCl_4] \) (1+1=2)
Which of the following complexes exhibit linkage isomerism?
(i) Discuss the violet colour of the complex \( [\text{Ti}(\text{H}_2\text{O})_6]^{3+} \) on the basis of crystal field theory.
(ii) Explain with reason that \( [\text{NiCl}_4]^{2-} \) is paramagnetic while \( [\text{Ni}(\text{CN})_4]^{2-} \) is diamagnetic.
Write IUPAC names of the following coordination compounds:
(i) [PtCl2(en)2](NO3)2
(ii) [Cr(NH3)6][Co(CN)6]
Which type of isomerism exists between the complexes [CoBr(NH3)5]SO4 and [CoSO4(NH3)5]Br?
Write the IUPAC names of the following coordination compounds:
i) \([Pt(NH_3)_2ClNO_2]\)
ii) \([Co(NH_3)_5(CO_3)]Cl\)
iii) \([Ni(CO)_4]\)
iv) \([Co(NH_3)_5ONO]^{2+}\) (1+1+1+1)
[NiCl4]2- is paramagnetic, while Ni(CO)4 is diamagnetic, although both are tetrahedral. Why?
(i) What is meant by ambidentate ligand? Give examples also. (2)
(ii) Write the IUPAC names of following compounds:
a) [Co(Br)2(en)2]+
b) K3[Fe(C2O4)3] (1+1)
What is meant by the chelate effect? Give example also.
Discuss the nature of bonding in \( [CoF_6]^{3-} \) and \( [Ni(CN)_4]^{2-} \) on the basis of valence bond theory (VBT) and find the value of magnetic moment in both.

OR
Explain the stereoisomerism in coordination compounds with suitable examples.
\( [NiCl_4]^{2-} \) is paramagnetic, while \( [Ni(CO)_4] \) is diamagnetic although both are tetrahedral. Why?
Explain the crystal field splitting in octahedral complexes with the help of a diagram. (4)
Write the IUPAC names of the following coordination compounds:
(i) \( [Co(en)_2ClBr]NO_3 \)
(ii) \( [Ni(NH_3)_4][Pt(CN)_4] \)
What is the coordination number of Co in the complex \( K_3[Co(C_2O_4)_3] \)?
$[NiCl_4]^{2-}$ is paramagnetic while $[Ni(CO)_4]$ is diamagnetic even though both are tetrahedral. Why?