Write the ground-state electron configuration for
Interpretation:
The electron configuration of
in ground state and magnetic properties of
are to be determined.
Concept introduction:
Electron configuration of a molecule is the arrangement of electrons in molecular orbitals of the molecule.
Two atomic orbitals combine to form a bonding and an antibonding molecular orbital. Orbitals that lie on internuclear axis combine to form sigma
molecular orbital, and orbitals parallel to each other combine to form
molecular orbitals.
The molecular orbital formed by the combination of
orbital forms bonding molecular orbital designated as
Molecular orbital formed by the combination of
orbital forms a bonding molecular orbital designated as
and an antibonding molecular orbital designated as
Molecular orbitals formed by combining
and
and
A molecule in which no unpaired electron is present is diamagnetic and in which all electrons are paired is paramagnetic.
Answer to Problem 92AP
Solution:
Explanation of Solution
The electron configuration of a boron atom is
The electron configuration for
in ground state is as follows:
There are two unpaired electrons in
and
orbitals (because py and px orbitals have same energy. Hence, pairing of electrons will be done only when each element is singly occupied). Hence,
molecule is paramagnetic (due to the presence of unpaired electron in the molecular orbital).
The
molecule is paramagnetic and its electron configuration in ground state is as follows:
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Chapter 9 Solutions
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