Q26 of 50 Page 124

A complex of the type [M(AA)2X2]n+is known to be optically active. What does this indicate about the structure of the complex? Give one example of such complex.

The structure has to be a cis-octahedral structure.

Example: [Co(en)2Cl2]+ is optically active


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24

Arrange the following complexes in the increasing order of conductivity of

their solution: [Co(NH3)3Cl3], [Co(NH3)4Cl2] Cl, [Co(NH3)6]Cl3 , [Cr(NH3)5Cl]Cl2


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A coordination compound CrCl3.4H2O precipitates silver chloride when treated

with silver nitrate. The molar conductance of its solution corresponds to a


total of two ions. Write structural formula of the compound and name it.


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Magnetic moment of [MnCl4]2– is 5.92 BM. Explain giving reason.

 28

On the basis of crystal field theory explain why Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands.