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Coordination Compounds

Question
CBSEENCH12007518
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Draw the structures of geometrical isomers of the following coordination complexes:
[Co(NH3)3Cl3] and [CoCl2(en)2+]
(en = ethylene diamine and atomic number of Co is 27).   

Solution
[Co(NH3)3Cl3] four geometric isomers are possible.



All the four geometric isomers are un-symmetrical and each shows optical isomerism i.e., forms two optical isomers d and l forms which are mirror image of each other in similar way as shown in (a).

[CoCl2(en)2]+: Two geometrical isomers cis-and transforms are possible.



Fig. d and 1 forms of cis [CoCl2(en)2]+.

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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