Out of NH3and CO, which ligand forms a more stable complex with a transition metal and why ?
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CO forms stable complex due to synergic bonding. The bond between metal and carbon atom of a carbonyl group is strong due to formation of pi bond in addition to sigma.
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CO forms more stable complex By the donation of lone pair of electrons of carbonyl carbon into a vacant orbital of the metal , the metal carbon(sigma) bond is formed. Similarly the metal carboN (pie) bond is formed by donation of a pair of electrons from a filled d-orbital of metal into the vacant antibon
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