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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

From experiment, we know that [CoF6]3− is para-magnetic and [Co(NH3)6]3+ is diamagnetic. Using the ligand field model, depict the electron configuration for each ion, and use this model to explain the magnetic property. What can you conclude about the effect of these ligands on the magnitude of Δ0?

Interpretation Introduction

Interpretation: The effect of ligands on the magnitude of Δ0 has to be predicted.

Concept introduction:

Spectrochemical series:  A list of ligands ordered in the basis of ligand strength.

I-<Br-<Cl-<F-< OH-< H2O < NH3< en <CN-<CO

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Explanation

The complex ion [CoF6]3-, the fluoride ions act as weak field ligand which results in high-spin complex. Hence, the presence of unpaired electrons attract by the magnets that confirms the complex is paramagnetic

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