Organic Chemistry
5th Edition
ISBN: 9780078021558
Author: Janice Gorzynski Smith Dr.
Publisher: McGraw-Hill Education
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Chapter 17, Problem 17.21P
Interpretation Introduction
Interpretation: The reason corresponding to the fact that cyclopentadienyl cation and radical are not aromatic is to be predicted, using inscribed polygon method.
Concept introduction: Inscribed polygon method is used to predict the relative energies of molecular orbitals of cyclic, completely conjugated molecules. Inscribed polygon is also known as Frost circle.
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Construct MO energy diagrams for the cyclopropenyl cation, radical, and anion. Which of these species is aromatic according to the Hückel criteria?
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Indicate the arrangement of electrons in these orbitals forcyclooctatetraene, and explain why cyclooctatetraene is not aromatic.
Chapter 17 Solutions
Organic Chemistry
Ch. 17 - Prob. 17.1PCh. 17 - Problem 17.2 What orbitals are used to form the...Ch. 17 - Problem-17.3. Give the IUPAC name for each...Ch. 17 - Prob. 17.4PCh. 17 - Problem-17.5 What is the structure of propofol,...Ch. 17 - Problem 17.6 What is the structure of a compound...Ch. 17 - Problem 17.7 How many NMR signals does each...Ch. 17 - Prob. 17.8PCh. 17 - Prob. 17.9PCh. 17 - Prob. 17.10P
Ch. 17 - Prob. 17.11PCh. 17 - Prob. 17.12PCh. 17 - Prob. 17.13PCh. 17 - Problem 17.14 Januvia, the trade name for...Ch. 17 - Prob. 17.15PCh. 17 - Problem 17.16 Rank the following compounds in...Ch. 17 - Problem 17.17 Draw the seven resonance structures...Ch. 17 - Prob. 17.18PCh. 17 - Prob. 17.19PCh. 17 - Prob. 17.20PCh. 17 - Prob. 17.21PCh. 17 - Problem 17.22 How many NMR signals does ...Ch. 17 - 17.23 Name each compound and state how many lines...Ch. 17 - Prob. 17.24PCh. 17 - Prob. 17.25PCh. 17 - Prob. 17.26PCh. 17 - 17.27 Give the IUPAC name for each compounds.
a....Ch. 17 - 17.28 Draw a structure corresponding to each...Ch. 17 - 17.29 a. Draw the 14 constitutional isomers of...Ch. 17 - Prob. 17.30PCh. 17 - Prob. 17.31PCh. 17 - Prob. 17.32PCh. 17 - 17.33 Label each compound as aromatic,...Ch. 17 - Prob. 17.34PCh. 17 - 17.35 Pentalene, azulene, and heptalene are...Ch. 17 - 17.36 The purine heterocycle occurs commonly in...Ch. 17 - Prob. 17.37PCh. 17 - 17.38
How many electrons does C contain?
How...Ch. 17 - Prob. 17.39PCh. 17 - 17.40 Explain the observed rate of reactivity of...Ch. 17 - 17.41 Draw a stepwise mechanism for the following...Ch. 17 - Prob. 17.42PCh. 17 - 17.43 Draw additional resonance structures for...Ch. 17 - Prob. 17.44PCh. 17 - Prob. 17.45PCh. 17 - 17.46 Which compound in each pair is the stronger...Ch. 17 - 17.47 Treatment of indene with forms its...Ch. 17 - Prob. 17.48PCh. 17 - 17.49 Draw the conjugate bases of pyrrole and...Ch. 17 - 17.50 a. Explain why protonation of pyrrole occurs...Ch. 17 - Prob. 17.51PCh. 17 - Prob. 17.52PCh. 17 - 17.53 How many signals does each compound...Ch. 17 - 17.54 Which of the diethylbenzene isomers (ortho,...Ch. 17 - 17.55 Propose a structure consistent with each...Ch. 17 - 17.56 Propose a structure consistent with each...Ch. 17 - 17.57 Thymol (molecular formula ) is the major...Ch. 17 - 17.58 You have a sample of a compound of molecular...Ch. 17 - 17.59 Explain why tetrahydrofuran has a higher...Ch. 17 - 17.60 Rizatriptan (trade name Maxalt) is a...Ch. 17 - 17.61 Zolpidem (trade name Ambien) promotes the...Ch. 17 - 17.62 Answer the following questions about...Ch. 17 - 17.63 Stanozolol is an anabolic steroid that...Ch. 17 - Prob. 17.64PCh. 17 - 17.65 Use the observed data to decide whether C...Ch. 17 - Prob. 17.66PCh. 17 - Prob. 17.67PCh. 17 - Prob. 17.68PCh. 17 - 17.69 Although benzene itself absorbs at in its ...
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- Use the inscribed polygon method to show why the cyclopentadienyl cation and radical are not aromatic.arrow_forwardImagine that you used isoprene as diene – in that case you don’t have to worry about assigning endo vs exo. Draw the "endo" and "exo" products of the Diels-Alder reaction between isoprene and maleic anhydride, and explain why the distinction is irrelevant here.arrow_forwardCan someone draw the arrows for this reaction so I can understand how the product was formed? I'm having trouble understanding that aspect of the Diels-Alder reaction.arrow_forward
- Draw out the orbital structure and indicate if aromatic, antiaromatic, or non-aromatic furan thiophenearrow_forwardIf 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_forwardExplain 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_forward
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