Organic Chemistry-Package(Custom)
4th Edition
ISBN: 9781259141089
Author: SMITH
Publisher: MCG
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Chapter 17, Problem 17.15P
Interpretation Introduction
Interpretation:
To explain why a neutral aromatic heterocycle in a five-membered ring can have only one oxygen atom but two or more nitrogen atoms.
Concept introduction:
To be aromatic a molecule must possess,
A molecule must be cyclic, planar, completely conjugated, and contain a particular number of pi electrons. To be aromatic, each p orbital must overlap with p orbitals on two adjacent atoms
All adjacent p orbitals must be aligned so that the 1t electron density can be delocalized.
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A bicyclic heterocycle aromatic ring with four N atoms.
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Chapter 17 Solutions
Organic Chemistry-Package(Custom)
Ch. 17 - Prob. 17.1PCh. 17 - What orbitals are used to form the bonds indicated...Ch. 17 - Give the IUPAC name for each compound.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 - How many 13C NMR signals does each compound...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 - Prob. 17.16PCh. 17 - Problem 17.16 Rank the following compounds in...Ch. 17 - Problem 17.17 Draw the seven resonance structures...Ch. 17 - Prob. 17.19PCh. 17 - Prob. 17.20PCh. 17 - Prob. 17.21PCh. 17 - Prob. 17.22PCh. 17 - Problem 17.22 How many NMR signals does ...Ch. 17 - 17.23 Name each compound and state how many lines...Ch. 17 - Prob. 17.25PCh. 17 - Prob. 17.26PCh. 17 - Prob. 17.27PCh. 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. 17.31PCh. 17 - Prob. 17.32PCh. 17 - Prob. 17.33PCh. 17 - 17.33 Label each compound as aromatic,...Ch. 17 - Prob. 17.35PCh. 17 - 17.35 Pentalene, azulene, and heptalene are...Ch. 17 - 17.36 The purine heterocycle occurs commonly in...Ch. 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 - 17.61 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. 17.63PCh. 17 - 17.65 Use the observed data to decide whether C...Ch. 17 - Prob. 17.65PCh. 17 - Prob. 17.66PCh. 17 - Prob. 17.67PCh. 17 - 17.69 Although benzene itself absorbs at in its ...
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- Benzopyrene, naphthalene and pyrene are members of these group of aromaticcompounds: *Non-benzenoid aromatic compoundsHeterocyclic aromatic compoundsBenzenoid aromatic compoundsHeteronuclear compoundsWhat type of aromatic compound is pyridine? *Benzenoid aromatic compoundNon-benzenoid aromatic compoundHomonuclear cyclic compoundHeterocyclic aromatic compoundWhat property of aromatic rings prevent the involvement of the conjugated structure toaddition reactions? *Radical stabilizationResonance stabilityInductive effectAromatic effectarrow_forwardWhich of the following species may not be considered aromatic? N- N- (A) (B) (C) (D) Compound D O Compound A ) Compound B Compound C ihution of the rearrow_forward3arrow_forward
- A 6-membered heterocycle aromatic ring with two N atoms positioned two carbons apart. a Pyridine b Pyrazine c Purine d Pyrrolearrow_forwardA bicyclic heterocycle aromatic ring with one N atom and the rings are of different size. a Indole b Pyrazine c Purine d Quinolinearrow_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.arrow_forward
- Is 2-pyridone aromatic?arrow_forwardCyclopropenones are described as having aromatic character. How would you account for this, given that the ring contains three ℼ-electronarrow_forwardAcridine is a heterocyclic aromatic compound obtained from coal tar that is used in the synthesis of dyes. The molecular formula of acridine is C13H9N, and its ring system is analogous to that of anthracene except that one CH group has been replaced by N. The two most stable resonance structures of acridine are equivalent to each other, and both contain a pyridine-like structural unit. Write a structural formula for acridine.arrow_forward
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