ORGANIC CHEMISTRY
5th Edition
ISBN: 9781259977596
Author: SMITH
Publisher: MCG
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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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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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- What is Resonance Theory? Sate five conclusions that can be drawn from the theory. State the two main experiments that were used to establish the extra stability of the benzene molecule. What are the factors that confer Aromaticity to an organic molecule? i. State the effects of substituents on a benzene derivative towards further aromatic substitution. Based on the above suggest the various types of substituents that can be attached to Benzene. What are the various ways by which alkenes may be synthesized? i. Give two examples each of Unsymmetrical alkenes and reagents. Give two examples of reactions of alkenes that result in Anti-Markonikov’s addition productsarrow_forward2- Apply the polygon-and-circle method to the cyclopentadienyl cation and explain whether it would be aromatic or not. Cyclopentadienyl cationarrow_forwardThe compound below is treated with N- bromosuccinimide (NBS) in the presence of light. 어 Draw both resonance structures for the radical produced by reaction of the compound with a bromine atom. Assume reaction occurs only at the weakest C-H bond. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Separate resonance structures using the → symbol from the drop-down menu. • Include all valence radical electrons in your answer.arrow_forward
- 2. State the two main experiments that were used to establish the extra stability of the benzene molecule. 3. What are the factors that confer Aromaticity to an organic molecule? 4. i. State the effects of substituents on a benzene derivative towards further aromatic substitution.arrow_forwardThe compound below is treated with W-bromosuccinimide (NBS) in the presence of light. Draw both resonance structures for the radical produced by reaction of the compound with a bromine atom. Assume reaction occurs only at the weakest C-H bond. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. Separate resonance structures using the ↔ symbol from the drop-down menu. • Include all valence radical electrons in your answer. Y ? #[ ] درarrow_forwardreaction, can occur with Fill in the chart below with: Does Not occur, Highly favored, Occurs when strong bases are used, favored when strong bases are used, occurs in competition with halides: TABLE 11.4 A Summary of Substitution and Elimination Reactions Halide type S,1 S,2 E1 E2 Occurs when strong bases are used Highly favored RCH,X (primary) Does not occur Does not occur RCHX (secondary) Favored when strong bases are used Can occur with Occurs in com- petition with E2 reaction Can occur with benzylic and allylic halides benzylie and allylic halides RCX (tertiary) Favored when bases are used Does not occur Occurs in com- petition with Syl reaction Favored in hydroxylie solvents C2004 Thomson - Brooks/Cole Halide Type SN1 SN2 E1 E2 RCH2X (primary) R2CHX (secondary R3CX (tertiary CH3X RCH=CH2 (allylic) CH2=CH- (vinylic)arrow_forward
- State the four criteria that must be fulfilled if an organic compound is to be described as aromatic. Apply these criterea to the three compounds shown below (of these, only the first is aromatic).arrow_forwardOrganic Chemistryarrow_forward3) How would you form the following molecule using a Diels-Alder reaction?arrow_forward
- Compounds P and Q can undergo a Diels-Alder reaction to form two regioisomeric products R and S as shown in Figure 5. OMe O C8H12O2 R C8H12O2 S Figure 5 Draw the chemical structures of regioisomeric compounds R and S. Using possible resonance contributors of P and Q predict which of the two regioisomers will be favoured in the reaction. Using curly arrows, draw the mechanism for the reaction of P and Q to form the dominant regioisomer you have predicted in your answer to part (ii) above.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_forwardThe compound below is treated with N-bromosuccinimide (NBS) in the presence of light. Draw both resonance structures for the radical produced by reaction of the compound with a bromine atom. Assume reaction occurs o the weakest C-H bond. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. Separate resonance structures using the symbol from the drop-down menu. Include all valence radical electrons in your answer. 000 Previousarrow_forward
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