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Question

Which molecule/ion among the following cannot act as a ligand in complex compounds?

A
CO
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B
CH4
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C
CN
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D
Br
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Solution

The correct option is A CH4
Methane CH4 cannot act as a ligand in complex compounds as all electrons in it are paired. There is no lone pair of electrons or pi electrons which can be donated to metal to form a bond.

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