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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

The complex ion [Co(CO3)3]3−, an octahedral complex with bidentate carbonate ions as ligands, has one absorption in the visible region of the spectrum at 640 nm. From this information,

(a) Predict the color of this complex and explain your reasoning.

(b) Is the carbonate ion a weak- or strong-field ligand?

(c) Predict whether [Co(CO3)3]3− will be paramagnetic or diamagnetic.

(a)

Interpretation Introduction

Interpretation: The color of the complex and the reason has to be explained.

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 640nm radiation falls in the orange color of the visible region, thus by absorbing orange color the...

(b)

Interpretation Introduction

Interpretation: Carbonate ion is weak or strong- field ligand has to be identified.

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.

(c)

Interpretation Introduction

Interpretation: The given complex is paramagnetic or diamagnetic has to be identified.

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.

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