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Coordination Compounds

Question
CBSEENCH12010208
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Give the formula of each of the following coordination entities:

(i) Co3+ Ion is bound to one Cl-1 , one NH3 molecule and two bidentate ethylenediamine (en) molecules.

(ii) Ni2+ ion is bound to two water molecules and two oxalate ions. Write the name and magnetic behavior of each of the above coordination entities.

(At. No. Co = 27, Ni = 28)

Solution

i) [Co(NH)3(en)2Cl]2+
Amminechloridobis (ethane-1, 2-diamine) cobalt (III) ion.

Number of unpaired electrons = 4

 So the complex is paramagnetic.


ii) [Ni(H2O)2(C2O4)]2-
 Diaquadioxalatonickelate (II) ion

 Number of unpaired electrons = 2

 So the complex is paramagnetic

Some More Questions From Coordination Compounds Chapter

Explain on the basis of valence bond theory that [Ni(CN)4]2–  ion with square planar is diamagnetic and the [NiCl4]2– ion with tetrahedral geometry is paramagnetic.

Predict the number of unpaired electrons in the square planar [Pt(CN)4,]2– ion.

The hexaquo manganese(II) ion contains five unpaired electrons, while the hexacynoion contains only one unpaired electron. Explain using crystal field theory.

Calculate the overall complex dissociation equilibrium constant for the Cu(NH3)42+ion, given β4 for this complex is 2.1 x 1013.

Identify the ligands from the following coordination compounds:
(a)    [Co(en)2Cl(NO2)2]
(b)    K[Co(CN)(CO2)(NO)]
(c)    K3[Al(OH)6]
(d)    [Co(H2O)2(NH3)4](OH)3

Write IUPAC name of the following complexes:
(a)    [Fe(H2O)6]SO4
(b)    [Cu(en)2(NO3)2

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