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  4. Which of the following ions form most stable complex compound?

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Q. Which of the following ions form most stable complex compound?

ManipalManipal 2011Coordination Compounds

Solution:

The magnitude of stability constants for some divalent metal ions of the first transition series with oxygen or nitrogen donor ligands increases in the order
$Mn ^{2+}< Fe ^{2+}< Co ^{2+}< Ni ^{2+}< Cu ^{2+}< Zn ^{2+}$