Concept explainers
Interpretation:
On the basis of aromaticity theory, the compounds A and B are different and the compounds C and D are the same is to be stated.
Concept introduction:
If a compound is aromatic then it has to follow certain rules. A compound that is cyclic, planar, completely conjugated and follows
If a compound is antiaromatic it has some characteristics features such as they are cyclic, nonplanar, completely conjugated compounds. They do not follow Huckel’s
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
Organic Chemistry
- If a molecule contains an aromatic ring, such as a benzene ring, attached to a non-aromatic ring, how does that affect the overall aromaticity of the molecule?arrow_forwardSome of the following compounds show aromatic properties, and others do not. Predict which ones are likely to be aromatic, and explain why they are aromatic or not. a) b)arrow_forwardDo you Understand Aromaticity? Determine whether the compounds below are aromatic or not. Rationalise all answers. b) d) 9) h) i)arrow_forward
- Determine the molecules below are aromatic. If not, explain why.arrow_forwardUsing the rules of aromaticity determine if the following organic compounds are aromatic A, B and C and explain why for eacharrow_forwardCurved arrows are used to illustrate the flow of electrons. Using the provided resonance structures, draw the curved electron- pushing arrows to show the interconversion between resonance hybrid contributors. Be sure to account for all bond- breaking and bond-making steps. I I I I :O: farrow_forward
- Which of the following statements is correct? O The molecule is aromatic and satisfies Huckel's rule O The molecule is not aromatic since it does not satisfies Huckel's rule O The molecule is not aromatic since it is a different ring than benzene The molecule is aromatic since it has Forms a ring and double bonds conjugated, all carbons are Sp2 hybridized The molecule is aromatic since has resonance structuresarrow_forwardwhat statement is correct about the two molecules?arrow_forwardPyrene has been determined experimentally to be aromatic. At first glance, however, its structure appears to break Hückel’s rule. How so? Can you explain why pyrene exhibits aromaticity?Hint: What are the characteristics of the π system on the periphery of the molecule?arrow_forward
- Which of the following is not a Huckel's criterion for aromaticity to. a.the molecule must have 4n pi electrons b. no alternative is correct c. the molecule must be fully conjugated d. the molecule must be flat and. e.the molecule must be cyclicarrow_forwardWhich statement concerning the substances below is correct? A) Compound I is non-aromatic. B) Compounds II and IV are aromatic. C) Compounds I and Ill are anti-aromatic. D) Compound II is anti-aromatic.arrow_forwardRizatriptan (trade name Maxalt) is a prescription drug used for the treatment of migraines. (a) How many aromatic rings does rizatriptan contain? (b) Determine the hybridization of each N atom. (c) In what type of orbital does the lone pair on each N reside? (d) Draw all the resonance structures for rizatriptan that contain only neutral atoms. (e) Draw all reasonable resonance structures for the five-membered ring that contains three N atoms.arrow_forward
- Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage LearningOrganic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning