Which of the following species is not expecte | vedclass

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(B) Ligands are species that can donate a pair of electrons to a central metal atom or ion to form a coordinate bond. For a species to act as a ligand

Vedclass · Accepted Answer

$NH_4^{+}$

Vedclass · Answer

(B) Ligands are species that can donate a pair of electrons to a central metal atom or ion to form a coordinate bond. For a species to act as a ligand,it must possess at least one lone pair of electrons. In the ammonium ion $(NH_4^{+})$,the nitrogen atom has used all its valence electrons to form four covalent bonds with hydrogen atoms. Since there is no lone pair of electrons available on the nitrogen atom in $NH_4^{+}$,it cannot donate electrons to a metal ion. Therefore,$NH_4^{+}$ is not expected to act as a ligand.

Which of the following species is not expected to be a ligand?

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