The adaptation of Frost's circleto generate the orbital energy level diagram is to beshown for cycloheptantrienyl cation. Concept introduction: The number of π electrons for a given polyene cation are first determined. These π electrons are assigned to the molecular orbitals in accordance with the rule that states that the lowest energy orbitals fill first and the maximum number of electrons in one orbital is two. In case of the two orbitals having comparable energies, each gets one electron before either orbital gets two. Frost's circle is used to set up the Huckel's molecular orbitals of planar, monocyclic, and completely conjugated polyenes. The energy levels can be superimposed on a polygon with appropriate sides with the vertex pointing down. By inscribing a polygon having appropriate number of sides within a circle so that one of its corners lies at the bottom, each of the polygon's corners defines a π electron energy level. A horizontal dotted line drawn through the center of the circle separates the bonding and anti-bonding molecular orbitals. The bonding orbitals are shown by the vertices below the halfway mark of the circle.The antibonding orbitals are shown by the vertices above the halfway mark. If the vertices lie exactly in the middle, then they represent non-bonding orbitals.

Question

Want to see the full answer?

Answer 1

Question

Chapter 12.20, Problem 23P

Interpretation Introduction

Interpretation:

The adaptation of Frost's circleto generate the orbital energy level diagram is to beshown for cycloheptantrienyl cation.

Concept introduction:

The number of π electrons for a given polyene cation are first determined.

These π electrons are assigned to the molecular orbitals in accordance with the rule that states that the lowest energy orbitals fill first and the maximum number of electrons in one orbital is two. In case of the two orbitals having comparable energies, each gets one electron before either orbital gets two.

Frost's circle is used to set up the Huckel's molecular orbitals of planar, monocyclic, and completely conjugated polyenes.

The energy levels can be superimposed on a polygon with appropriate sides with the vertex pointing down.

By inscribing a polygon having appropriate number of sides within a circle so that one of its corners lies at the bottom, each of the polygon's corners defines a π electron energy level.

A horizontal dotted line drawn through the center of the circle separates the bonding and anti-bonding molecular orbitals.

The bonding orbitals are shown by the vertices below the halfway mark of the circle.The antibonding orbitals are shown by the vertices above the halfway mark. If the vertices lie exactly in the middle, then they represent non-bonding orbitals.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

None

Transmitance 3. Which one of the following compounds corresponds to this IR spectrum? Point out the absorption band(s) that helped you decide. OH H3C OH H₂C CH3 H3C CH3 H3C INFRARED SPECTRUM 0.8- 0.6 0.4- 0.2 3000 2000 1000 Wavenumber (cm-1) 4. Consider this compound: H3C On the structure above, label the different types of H's as A, B, C, etc. In table form, list the labeled signals, and for each one state the number of hydrogens, their shifts, and the splitting you would observe for these hydrogens in the ¹H NMR spectrum. Label # of hydrogens splitting Shift (2)

None