5. Draw all five pi Molecular Orbitals of the cyclopentadienyl cation using appropriateshading. Indicate the relative energies of each MO by analyzing the number of bonding andanti bonding interactions. Label each MO as either bonding, non-bonding or antibonding.Show how the four pi electrons occupy the lowest energy MOs. Repeat with cyclopentadienylradical (5 pi electrons) and cyclopentadienyl anion ( 6 pi electrons). Label thecyclopentadienyl cation, radical and anion as either aromatic, non aromatic or anti-aromatic.*= + or. or -

Let's analyze the given information about the pi Molecular Orbitals of the cyclopentadienyl cation,…

Answered: 5. Draw all five pi Molecular Orbitals…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter18: Aromaticity

Section: Chapter Questions

Problem 26CTQ

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5. Draw all five pi Molecular Orbitals of the cyclopentadienyl cation using appropriate shading. Indicate the relative energies of each MO by analyzing the number of bonding and anti bonding interactions. Label each MO as either bonding, non-bonding or antibonding. Show how the four pi electrons occupy the lowest energy MOs. Repeat with cyclopentadienyl radical (5 pi electrons) and cyclopentadienyl anion ( 6 pi electrons). Label the cyclopentadienyl cation, radical and anion as either aromatic, non aromatic or anti-aromatic. * = + or.or -
7. Provide a MO diagram, which depicts the relative energies of the pi molecular orbitals of Cyclooctatetraene. Label each orbital. Label the HOMO and the LUMO. Show which MOs are filled in Cyclooctatetraene's ground state (A diagram will be sufficient; you do not have to draw the MOS).
How many atoms of each hybridization state are there (sp,sp2, sp3)?What would be the result after the shown molecule is carried through the 4 step sequence? Show each intermediate and stereochemistry 1. 1eq. MeLi, then H2O workup 2.TsCl/pyr 3.NaOtBu/BuOH 4.OsO4/NaHSO3 And What is the relationship between the isomeric end products from them?
Answer the following questions for the MOs of 1,3,5-hexatriene: a. Which are bonding MOs, and which are antibonding MOs? b. Which MOs are the HOMO and the LUMO in the ground state? c. Which MOs are the HOMO and the LUMO in the excited state? d. Which MOs are symmetric, and which are antisymmetric? e. What is the relationship between HOMO and LUMO and symmetric and antisymmetric MOs?
2. Provide the following answer using the following compound below. a. Assign the hybridization for each atom, except hydrogen. b. Determine the number of atomic orbitals and Molecular orbitals (AO, MO). c. Draw the atomic orbitals for each atom and their MO d. Draw the energy diagram. e. Assign the HOMO and LUMO in the energy diagram. H H-C-C=C-H :O: H
Answer the following questions for the MOs of 1,3-butadiene: a. Which are pie bonding MOs, and which are p* antibonding MOs? b. Which MOs are symmetric, and which are antisymmetric? c. Which MO is the HOMO and which is the LUMO in the ground state? d. Which MO is the HOMO and which is the LUMO in the excited state? e. What is the relationship between the HOMO and the LUMO and symmetric and antisymmetric orbitals?
Answer the following questions for the MOs of 1,3-butadiene: a. Which are p bonding MOs, and which are p* antibonding MOs? b. Which MOs are symmetric, and which are antisymmetric? c. Which MO is the HOMO and which is the LUMO in the ground state? d. Which MO is the HOMO and which is the LUMO in the excited state? e. What is the relationship between the HOMO and the LUMO and symmetric and antisymmetric orbitals?
Construct an MO energy diagram for the cycloheptatrienyl cation and describe its ground-state electron configuration
Consider the molecule whose line structure is below: 1. The molecule under discussion: a. has no stabilization due to delocalized π electrons b. is stabilized by delocalized π electrons 2. Identify the numbers of atoms that contribute to the delocalized orbitals. Use a comma as a separator. Arrange values from minimum to maximum. For consecutive values use "-" (for example: 1,3,5-10). If there are no delocalized orbitals enter "none".
Assign a designation of re, si, or N (not prochiral) to indicate which face we are looking down on for each of the sp²-hybridized carbons in the structure below. Jala
Answer the following questions for the molecular orbitals (MOs) of 1,3,5,7-octatetraene: a. How many MOs does the compound have? b. Which are the bonding MOs, and which are the antibonding MOs? c. Which MOs are symmetric, and which are antisymmetric? d. Which MO is the HOMO and which is the LUMO in the ground state? e. Which MO is the HOMO and which is the LUMO in the excited state? f. What is the relationship between HOMO and LUMO and symmetric and antisymmetric orbitals? g. How many nodes does the highest-energy MO of 1,3,5,7-octatetraene have between the nuclei?
The photo dimerization of benzophenone to benzopinacol is initiated by what type of electronic transition that then rapidly decomposes to a diradical since putting in electrons in anti bonds breaks bonds! The diradical then starts abstracting hydrogens from solution as pictured in the text? σ = electrons in sigma bonds n = electrons in non-bonding orbitals π electrons in pi bonds. anti bonds Hint: This process is very important because although the molecule responsible for human vision (retinal) is not a very long conjugated pi system, this transition allows retinal to absorb visible light. a. n to σ* b. σ to σ* C. π το π d. n to П e. σ to П* f. π to σ'

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