(a)
Interpretation:
The aromatic cyclopolyenes that are neutral are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
(b)
Interpretation:
The aromatic cyclopolyenes that have single negative charge are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
(c)
Interpretation:
The aromatic cyclopolyenes that have double negative charge are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
Physical Chemistry
- Calculate the degrees of unsaturation of the following molecular formula, and propose valid structures. C9H8O C8H6O3arrow_forwardIs the following compound aromatic? Describe comprehensivelyarrow_forwardPredict the electronic configurations of (a) the benzeneanion, (b) the benzene cation. Estimate the π-bond energy in each case.arrow_forward
- Write the frontier molecular orbital analysis for the cycloaddition of butadiene with butadiene when both interact in a suprafacial manner. Is this reaction allowed?arrow_forwardQuestion: In the context of molecular orbital theory, explain the difference between the relative stability of cyclooctatetraene and benzene, as well as the factors that contribute to the exceptional stability of benzene.arrow_forwardWhich of the statement is INCORRECT? a. The increase in stability of 2,4-hexadiene over 1,3-hexadiene is due to the increased double bond substitution of the former. b. The stabilization of dienes by conjugation is less pronounced than the aromatic stabilization of benzene. c. Resonance description in alkenes usually involves charge separation. d. Higher energy pi-orbitals often have decreasing number of nodes.arrow_forward
- Calculate the index of hydrogen deficiency of cyclohexene, C6H10, and account for this deficiency by reference to its structural formula.arrow_forwardWhich of these images are not aromatic?arrow_forwardDraw the structures of 1,3-pentadiene and 1,4-pentadiene and label the carbons. Predict the trendin C-C single bond lengths in the two compounds.arrow_forward
- Explain how to construct the molecular orbitals of a conjugated cyclic system similar tobenzene and cyclobutadiene. Use the polygon rule to draw the energy diagram, and fillin the electrons to show whether a given compound or ion is aromatic or antiaromatic.arrow_forwardProvide the bond line structure of a compound that is able to undergo Allylic lone pair and allylic carbocation resonance. Provide all resonance structures and appropriate arrows. Indicate which resonance state is most stable and why.arrow_forwardAside from the multiple ring systems shown in the table, Naphthalene, Anthracene,Phenanthrene Chrysene,Pyrene, and Benzopyrene. Search for 1 multiple ring aromatic compound and list down its properties, sources, and uses or applications.arrow_forward
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning