Prepare molecular orbital energy-level diagrams for C22-. Label the orbital type (e.g. o, n*, non-bonding...) and orbital symmetry (i.e. g or u). Sketch the MO pictures for the highest occupied molecular orbital(s) (HOMO), and lowest unoccupied molecular orbital(s) (LUMO).

Prepare molecular orbital energy-level diagrams for C22-. Label the orbital type (e.g. o, n*, non-bonding...) and orbital symmetry (i.e. g or u). Sketch the MO pictures for the highest occupied molecular orbital(s) (HOMO), and lowest unoccupied molecular orbital(s) (LUMO).

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section: Chapter Questions

Problem 20.48P

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Concept explainers

Quantum Mechanical Treatment of the Valence Bond Theory

Quantum mechanical treatment of valence bond theory refers to the relationship established between the quantum mechanical theory and the valence bond theory to describe the chemical bonding in a particular molecule.

Question

When acetylene (ethyne) is passed through a solution of copper (I) chloride,
a red precipitate of copper acetylide, Cu2C2, is formed. This is a common
test for the presence of acetylene.
Prepare molecular orbital energy-level diagrams for C22-. Label the orbital
type (e.g. o, n*, non-bonding...) and orbital symmetry (i.e. g or u). Sketch the
MO pictures for the highest occupied molecular orbital(s) (HOMO), and
lowest unoccupied molecular orbital(s) (LUMO).

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