A group of atoms can function as a ligand onl | vedclass

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(B) ligand is defined as an atom,molecule,or ion that donates at least one pair of electrons to the central metal atom or ion to form a coordinate bon

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it has an unshared electron pair

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(B) ligand is defined as an atom,molecule,or ion that donates at least one pair of electrons to the central metal atom or ion to form a coordinate bond. Since ligands donate electron pairs,they act as $Lewis$ bases. Therefore,the essential requirement for a species to act as a ligand is the presence of at least one unshared electron pair (lone pair) that can be donated to the metal center.

$A$ group of atoms can function as a ligand only when

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