A reaction of cobalt ( III ) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet-coloured) and B (green-coloured). A can show optical activity, but, B is optically inactive. What type of isomers do A and B represent?

Question

A reaction of cobalt ( III ) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet-coloured) and B (green-coloured). A can show optical activity, but, B is optically inactive. What type of isomers do A and B represent?, Coordination isomers, Linkage isomers, Ionisation isomers, Geometrical isomers

MARKS App · Accepted Answer

The coordination number of cobalt is 6 . The mole ratio of CoCl 3 and en is 1 : 2 . Hence, CoCl 3 + 2 en → Co en 2 Cl 2 Cl The complex formed shows geometrical isomerism. The complex exists as cis and trans isomers among which the trans isomer is optically inactive.

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