In the compound [Ni(en)₂(H₂O)₂]SO₄ (where en = ethylenediamine) the oxidation number and coordination number of nickel are, respectively A)2 and 6. B)4 and 6. C)6 and 6. D)2 and 4. E)4 and 4.

Question

Quizplus · Accepted Answer

The compound [Ni(en)3]2+ shows that nickel is coordinated with three ethylenediamine (en) ligands, each en ligand being a bidentate ligand, contributing two coordination sites. Thus, the coordination number of nickel is 6. Since the compound is a cation with a 2+ charge and ethylenediamine is a neutral ligand, the oxidation state of nickel must be +2 to account for the overall charge.

In the Compound [Ni(en)2(H2O)2]SO4 (Where En = Ethylenediamine) the Oxidation

In the Compound [Ni(en)₂(H₂O)₂]SO₄ (Where En = Ethylenediamine) the Oxidation