7 The pentadienyl radical, H2C“CH¬CH“CH¬CH2 ) Draw the MOs of the pentadienyl system in order of increasing energy

Organic Chemistry: A Guided Inquiry
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ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter18: Aromaticity
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7 The pentadienyl radical, H2C“CH¬CH“CH¬CH2
 ) Draw the MOs of the pentadienyl system in order of increasing energy

Expert Solution
Step 1

To draw the molecular orbitals of the pentadienyl system in order of increasing energy

 

Step 2

In a molecule, the number of molecular orbitals always equals the number of p orbitals that contributing to the π-system.

In the case of pentadienyl radical, there are all the 5 orbitals that contributing to the π-system by the resonance. Therefore, the number of molecular orbitals is 5.

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