Engineering
Chemistry
Isomerism in Coordination Compounds
Question

The compound [CoCl2(NH3)2(en)] can form:

Linkage isomers
Coordination isomers
Optical isomers
Linkage as well as optical isomers
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Solution
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The compound [CoCl2(NH3)2(en)] has two geometrical isomers. One is the cis-isomer (with respect to NH3) and the other is the trans- isomer (with respect to NH3).

The cis-isomer has two optically active forms, d-cis isomer and I-cis isomer. So, the compound [CoCl2(NH3)2(en)] can form geometrical isomers as well as optical isomers. 
Hence, the correct answer is option (C).

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