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The ligand called pi acid is...

The ligand called `pi` acid is

A

CO

B

`NH_3`

C

`C_2O_4^(2-)`

D

Ethylene diamine

Text Solution

Verified by Experts

The correct Answer is:
A
Carbon monoxide is `pi` - acid ligand as it characterises both metal to carbon and carbon to metal bonding. The latter is known as `pi` - acidic character.
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