Interpretation:
Based on the characteristics of the MO diagram of cyclobutadienyl dication, it is to be determined if it is aromatic, antiaromatic, or nonaromatic.
Concept introduction:
To derive the relative energies of pi molecular orbitals, a Frost method is used. This method is applicable to any species with a fully conjugated, cyclic pi system. This method involves drawing a polygon that represents the cyclic compound’s line structure, with one of the vertices pointing directly upwards. Each of the four vertices then represents the energy of a
Antiaromatic compounds have cyclic
Nonaromatic compounds are neither unusually stable nor unusually unstable.
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
ORGANIC CHEMISTRY SG/SM PA +SQUARECAP E
- [References) The degree of unsaturation, or index of hydrogen deficiency, is the number of pi bonds plus rings in a molecule. Specify the degree of unsaturation (index of hydrogen deficiency) of the following formulas: (a) C4H4 (b) C13H1402 (c) C6H10N₂04 Submit Answer Retry Entire Group 9 more group attempts remainingarrow_forward1. The energy of a photon is. proportional to its wavelength and proportional to its frequency. (directly or indirectly) 2. Which of the following has a lower characteristic stretching frequency, the C O bond or the C-O bond? Explain briefly. C=0 3. Ethyne HCECH does not show IR absorption in the region 2000-2500 em-! because. 4. Which statement best explains why a carbonyl absorbs infrared radiation at a higher frequency than an alkene absorption?arrow_forward3.Assuming that all the following compounds are planar, circle those that are aromatic, underline those that are antiaromatic and label those that are non-aromatic H H 04880x9 D: + N:arrow_forward
- Which of the following resonance structures has the greatest contribution to the hybrid? Explain.arrow_forward2. Identify and describe mistake(s) in the following structures. [9 points] a) b) ZI K c) H3C-, Narrow_forwardWhy the extended Pi(π) conjugated are suitable for Fluorescence properties? Please shortly answer at your own words. Answer should be to the point(specific 4-5 lines).arrow_forward
- 3. Evaluate the following related species which are all planar or nearly so. One is aromatic, one First determine the number of p-n electrons available in each, antiaromatic, and one is non-aromatic. then tell which is aromatic, which anti-aromatic, which non-aromatic. H H C5H5 C5H6 C5H5* p-n electrons? arom/anti-arom/non-aromarrow_forwardRank the following molecules from lowest to highest energy (1 is lowest). Please explain in the simpilest way possible, I am super confused on how by looking at the molecule you know of it will be equitorial or axial..arrow_forwardProvide the curved arrow formalism of the compound shown below treated wtih Br2 in EtOH. Include transition states. I apprecite the help!arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningPhysical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,