Question:

Which one of the following ions forms most stable complex compound?

Updated On: Apr 17, 2024
  • $Cu^{2+}$
  • $Ni^{2+}$
  • $Fe^{2+}$
  • $Mn^{2+}$
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The Correct Option is D

Solution and Explanation

$Mn^{2+}$ will have half-filled more stable $d^5$ configuration and without disturbing it an outer spin complex can be formed.
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Concepts Used:

Coordination Compounds

A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.

Coordination entity:

A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.

Ligands:

A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.