
Concept explainers
Using the molecular orbital model, write electron configurations for the following diatomic species and calculate the bond orders. Which ones are paramagnetic? Place the species in order of increasing bond length and bond energy.
a. CN+
b. CN
c. CN−
(a)

Interpretation: The electronic configuration for the given diatomic species is to be determined and their bond orders have to be calculated. The paramagnetic species have to be identified. The given molecules have to be placed in the correct order of increasing bond length and bond energy.
Concept introduction: The electronic configuration for multi-electron diatomic is written using the molecular orbitals, derived from the
The bond order is directly proportional to the bond energy and inversely proportional to the bond length.
To determine: The electronic configuration of
Answer to Problem 56E
Answer
The configuration of
Explanation of Solution
The electronic configuration of the involved atoms is,
The number of valence electrons present in
The molecular orbital configuration of
Number of bonding electrons
Number of non-bonding electrons
Hence,
Bond order
No unpaired electron is present; hence it is a diamagnetic molecule.
(b)

Interpretation: The electronic configuration for the given diatomic species is to be determined and their bond orders have to be calculated. The paramagnetic species have to be identified. The given molecules have to be placed in the correct order of increasing bond length and bond energy.
Concept introduction: The electronic configuration for multi-electron diatomic is written using the molecular orbitals, derived from the
The bond order is directly proportional to the bond energy and inversely proportional to the bond length.
To determine: The electronic configuration of
Answer to Problem 56E
Answer
The configuration of
Explanation of Solution
The electronic configuration of the involved atoms is,
The number of valence electrons present in
The molecular orbital configuration of
Number of bonding electrons
Number of non-bonding electrons
Hence,
Bond order
The
(c)

Interpretation: The electronic configuration for the given diatomic species is to be determined and their bond orders have to be calculated. The paramagnetic species have to be identified. The given molecules have to be placed in the correct order of increasing bond length and bond energy.
Concept introduction: The electronic configuration for multi-electron diatomic is written using the molecular orbitals, derived from the
The bond order is directly proportional to the bond energy and inversely proportional to the bond length.
To determine: The electronic configuration of
Answer to Problem 56E
Answer
The configuration of
Explanation of Solution
The electronic configuration of the involved atoms is,
The number of valence electrons present in
The molecular orbital configuration of
Number of bonding electrons
Number of non-bonding electrons
Hence,
Bond order
No unpaired electron is present; hence it is a diamagnetic molecule.
The diatomic configuration of a diatomic species can be determined using the molecular orbital diagram. The difference between the bonding electrons and the non-bonding electrons divided by two gives the bond order of the molecule.
The bond order is inversely proportional to bond length. The molecule having the least bond order value has the greatest bond length.
The bond order is directly proportional to bond energy. The molecule having the least bond order value has the least bond energy.
The bond order is directly proportional to the bond energy and inversely proportional to the bond length.
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Chapter 9 Solutions
Chemistry
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