Hexafluorocobaltate(III) ion is a high-spin complex. Draw the orbital-energy splitting diagram for its d orbitals.

Short Answer

Expert verified

In this complex, there are two higher energy egorbitals and three lower energy t2g orbitals formed, with a total of 6 electrons.

Step by step solution

01

Give data

Hexafluorocobaltate(III) ion is a high-spin complex

02

Concept Introduction

The complex with the same number of unpaired electrons as the free metal ion is termed a high-spin complex and it has the maximum number of unpaired electrons. High-spin complexes occur when weak-field ligands bond with central metal ions because they cause small splitting energy.

Weak-field ligands give smaller splitting energy () because they don't cause large splitting oforbitals (F- is a weak-field ligand).

03

Solution

CoF63- in this complex Co has an oxidation state 3+, so the number of electrons in its d subshell is 6. The electron configuration of Co is 3d74s2. In this complex, there are two higher energy ( eg) orbitals and three lower energy ( t2g ) orbitals formed.

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