Organic Chemistry
4th Edition
ISBN: 9780073402772
Author: Janice G. Smith
Publisher: MCG
expand_more
expand_more
format_list_bulleted
Question
Chapter 15, Problem 15.46P
Interpretation Introduction
Interpretation:
To prepare 5-bromo-1-methylcyclopentene in good yield by allylic bromination of 1-methylcyclopentene and explain whether it is possible or not.
Concept introduction:
Allylic C-H bonds are weaker than other sp3 hybridized C-H bonds, the allylic carbon can be selectively halogenated by using N-bromosuccinimide or NBS reagent in the presence peroxide to form the allylic halide. N-bromosuccinimide contains a weak N-Br bond that is homolytically cleaved with light to generate a bromine radical, initiating an allylic halogenation reaction.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
why do (R)-3-chloro-1-methylcycloprop-1-ene and 5-Bromo-1,3-Cyclohexadiene react differently with cyanide (why doesn't cyanide pass through its usual mechanism for these two products)
why do (R)-3-chloro-1-methylcycloprop-1-ene and 5-Bromo-1,3-Cyclohexadiene react differently with cyanide (why doesn't cyanide pass through its usual mechanism for these two products and what did you obtain these specific products)
how can you explain the fact that trans-1-Bromo-2-methylcyclohexane yields the non-Zaitsev elimination product 3-methylcyclohexane on treatment with base
Chapter 15 Solutions
Organic Chemistry
Ch. 15 - Prob. 15.1PCh. 15 - Prob. 15.2PCh. 15 - Draw the product formed when a chlorine atom (Cl)...Ch. 15 - Prob. 15.4PCh. 15 - Prob. 15.5PCh. 15 - Problem 15.6 Using mechanism 15.1 as guide, write...Ch. 15 - Calculate m0 for the two propagation steps in the...Ch. 15 - Prob. 15.8PCh. 15 - Problem 15.8 Which bond in the each compound is...Ch. 15 - Prob. 15.10P
Ch. 15 - Prob. 15.11PCh. 15 - Synthesize each compound from (CH3)3CH. a....Ch. 15 - Prob. 15.13PCh. 15 - Prob. 15.14PCh. 15 - Prob. 15.15PCh. 15 - Prob. 15.16PCh. 15 - Prob. 15.17PCh. 15 - Prob. 15.18PCh. 15 - Draw all constitutional isomers formed when each...Ch. 15 - Draw the structure of the four allylic halides...Ch. 15 - Which compounds can be prepared in good yield by...Ch. 15 - Which CH bond is most readily cleaved in linolenic...Ch. 15 - Prob. 15.23PCh. 15 - Draw the products formed when each alkene is...Ch. 15 - Problem 15.24 When adds to under radical...Ch. 15 - Prob. 15.26PCh. 15 - Draw an energy diagram for the two propagation...Ch. 15 - Prob. 15.28PCh. 15 - Problem 15.27 Draw the steps of the mechanism that...Ch. 15 - Prob. 15.30PCh. 15 - Prob. 15.31PCh. 15 - Prob. 15.32PCh. 15 - Prob. 15.33PCh. 15 - Why is a benzylic CH bond labeled in red unusually...Ch. 15 - Prob. 15.35PCh. 15 - Prob. 15.36PCh. 15 - Prob. 15.37PCh. 15 - Prob. 15.38PCh. 15 - What alkane is needed to make each alkyl halide by...Ch. 15 - Which alkyl halides can be prepared in good yield...Ch. 15 - Prob. 15.41PCh. 15 - 15.40 Explain why radical bromination of p-xylene...Ch. 15 - a. What product(s) (excluding stereoisomers) are...Ch. 15 - Prob. 15.44PCh. 15 - Prob. 15.45PCh. 15 - Prob. 15.46PCh. 15 - 15.44 Draw all constitutional isomers formed when...Ch. 15 - Draw the organic products formed in each reaction....Ch. 15 - Prob. 15.49PCh. 15 - 15.47 Treatment of a hydrocarbon A (molecular...Ch. 15 - Prob. 15.51PCh. 15 - Prob. 15.52PCh. 15 - Prob. 15.53PCh. 15 - Prob. 15.54PCh. 15 - 15.53 Consider the following bromination: .
a....Ch. 15 - 15.54 Draw a stepwise mechanism for the following...Ch. 15 - Prob. 15.57PCh. 15 - An alternative mechanism for the propagation steps...Ch. 15 - Prob. 15.59PCh. 15 - Prob. 15.60PCh. 15 - Devise a synthesis of each compound from...Ch. 15 - Devise a synthesis of each target compound from...Ch. 15 - Devisea synthesis of each target compound from the...Ch. 15 - Devise a synthesis of each compound using CH3CH3...Ch. 15 - Prob. 15.65PCh. 15 - 15.63 As described in Section 9.16, the...Ch. 15 - 15.64 Ethers are oxidized with to form...Ch. 15 - Prob. 15.68PCh. 15 - Prob. 15.69PCh. 15 - 15.67 In cells, vitamin C exists largely as its...Ch. 15 - What monomer is needed to form each...Ch. 15 - Prob. 15.72PCh. 15 - Prob. 15.73PCh. 15 - 15.71 Draw a stepwise mechanism for the following...Ch. 15 - 15.72 As we will learn in Chapter 30, styrene...Ch. 15 - Prob. 15.76PCh. 15 - 15.74 A and B, isomers of molecular formula , are...Ch. 15 - Prob. 15.78PCh. 15 - Radical chlorination of CH3CH3 forms two minor...Ch. 15 - 15.76 Draw a stepwise mechanism for the...Ch. 15 - Prob. 15.81PCh. 15 - Prob. 15.82PCh. 15 - Prob. 15.83P
Knowledge Booster
Similar questions
- Following are diastereomers (A) and (B) of 3-bromo-3,4-dimethylhexane. On treatment with sodium ethoxide in ethanol, each gives 3,4-dimethyl-3-hexene as the major product. One diastereomer gives the E alkene, and the other gives the Z alkene. Which diastereomer gives which alkene? Account for the stereoselectivity of each -elimination.arrow_forwardDoes the reaction of S-2-bromobutane with sodium hydroxide produce a racemic mixturearrow_forwardWhen 3-bromo-1-methylcyclohexene undergoes solvolysis in hot ethanol, two productsare formed. Propose a mechanism that accounts for both of these productsarrow_forward
- what product would you expect from photochemical cyclization of (2E,4z,6z)-2,4,6-octatriene with (MO) explinationarrow_forwardmost of the additions of bromine to double bonds gave entirely antistereochemistry. Explain why the addition to phenanthrene gives a mixture of synand anti stereochemistry. When the product from (c) is heated, HBr is evolved and 9-bromophenanthrene results.Propose a mechanism for this dehydrohalogenation.arrow_forwardWrite the mechanisms of the following reactions and examine the products as stereoisomeric.arrow_forward
- Consider the substitution reaction that takes place when (R)-3-bromo-3-methylhexane is treated with sodium methoxide. Deduce the mechanism of this reaction working step by step. Write all possible products showing the stereochemistry.arrow_forwardWhat stereochemistry would you expect for the alkene obtained byE2 elimination of (1S,2S)-1,2-dibromo-1,2-diphenyl ethane?arrow_forwardWhat starting alkene reacted with I2 in a solution of CH2Cl2 is required to produce 1,2-diiodoocyclopentane?arrow_forward
- The reaction of butan-2-ol with concentrated aqueous HBr goes with partial racemization, giving more inversion thanretention of configuration. Propose a mechanism that accounts for racemization with excess inversion.(b) Under the same conditions, an optically active sample of trans-2-bromocyclopentanol reacts with concentrated aqueous HBr to give an optically inactive product, (racemic) trans-1,2-dibromocyclopentane. Proposea mechanism to show how this reaction goes with apparently complete retention of configuration, yet withracemization. (Hint: Draw out the mechanism of the reaction of cyclopentene with Br2 in water to give thestarting material, trans-2- bromocyclopentanol. Consider how parts of this mechanism might be involved in thereaction with HBr.)arrow_forwardHow many distinct alkene products are possible when the alkyl iodide below undergoes E2 elimination?arrow_forwardHow many alkenes yield 2,2,3,4,4−pentamethylpentane on catalytic hydrogenation?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning