General Chemistry
General Chemistry
4th Edition
ISBN: 9781891389603
Author: Donald A. McQuarrie, Peter A. Rock, Ethan B. Gallogly
Publisher: University Science Books
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Chapter 9, Problem 9.65P

(a)

Interpretation Introduction

Interpretation:

The magnetic behavior of CO molecule has to be given.

Concept Introduction:

Bond order of a molecule or ion is calculates by the following formula,

Bond order =(Nb)-(Na)2

Where, Nb is number of electrons in bonding orbital.

Na is number of electrons in antibonding orbital.

Paramagnetic and diamagnetic compounds:

Paramagnetic compounds have unpaired electrons and are attracted to magnetic field whereas diamagnetic compounds have paired spins and are repelled by the magnetic field

(a)

Expert Solution
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Explanation of Solution

The molecular configuration of carbon monoxide is,

  (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(π2px)2(π2py)2(σ2pz)2

There is no unpaired electron in the carbon monoxide.  Hence it is not a paramagnetic compound.

(b)

Interpretation Introduction

Interpretation:

The magnetic behavior of F2 molecule has to be given.

Concept Introduction:

Refer to part (a).

(b)

Expert Solution
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Explanation of Solution

The molecular electronic configuration of fluorine molecule is.

F2=(σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(σ2pz)2(π2px)2(π2py)2(π*2px)2(π*2py)2

There is no unpaired electron in the F2 molecule.  Hence it is not a paramagnetic compound.

(c)

Interpretation Introduction

Interpretation:

The magnetic behavior of O2 molecule has to be given.

Concept Introduction:

Refer to part (a).

(c)

Expert Solution
Check Mark

Explanation of Solution

The molecular configuration of O2 is,

  (σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(σ2pz)2(π2px)2(π2py)2(π*2px)1(π*2py)1.

Oxygen molecule has two unpaired electrons so it can act like magnet. O2 is paramagnetic.

(d)

Interpretation Introduction

Interpretation:

The magnetic behavior of NO molecule has to be given

Concept Introduction:

Refer to part (a).

(d)

Expert Solution
Check Mark

Explanation of Solution

The molecular configuration of NO molecule is,

  NO=(σ1s)2(σ*1s)2(σ2s)2(σ*2s)2(σ2pz)2(π2px)2(π2py)2(π*2px)1

NO has one unpaired electron so it act like magnet. NO is paramagnetic.

Since oxygen molecule has two unpaired electrons it shows strong mass shift in magnetic susceptibility balance.

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