
Concept explainers
(a)
Interpretation:
Number of carbon-carbon sigma bonds present in the given 2-butyne has to be identified.
Concept introduction:
Sigma bonds: A sigma bond is a covalent bond formed by head on overlap of atomic orbitals that carries two electrons. The bonding represented as a single line between two atoms.
Head-on overlap:
Head-on overlap of two atomic orbitals forms a molecular orbital known as sigma bonds.
Side-to-side overlap:
Side-to-side overlap of two atomic orbitals forms a molecular orbital known as pi-bonds.
(b)
Interpretation:
Number of carbon-carbon sigma bonds present in the given anthracene has to be identified.
Concept introduction:
Sigma bonds: A sigma bond is a covalent bond formed by head on overlap of atomic orbitals that carries two electrons. The bonding represented as a single line between two atoms.
Head-on overlap:
Head-on overlap of two atomic orbitals forms a molecular orbital known as sigma bonds.
Side-to-side overlap:
Side-to-side overlap of two atomic orbitals forms a molecular orbital known as pi-bonds.
c)
Interpretation:
Number of carbon-carbon sigma bonds present in the given 2,3-dimethylpentane has to be identified.
Concept introduction:
Sigma bonds: A sigma bond is a covalent bond formed by head on overlap of atomic orbitals that carries two electrons. The bonding represented as a single line between two atoms.
Head-on overlap:
Head-on overlap of two atomic orbitals forms a molecular orbital known as sigma bonds.
Side-to-side overlap:
Side-to-side overlap of two atomic orbitals forms a molecular orbital known as pi-bonds.

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Chapter 11 Solutions
Connect 1 Semester Access Card for General Chemistry: The Essential Concepts
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