Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 6.27P
Reaction of this bicycloalkene with bromine in carbon tetrachloride gives a trans dibromide. In both (a) and (b), the bromine atoms are trans to each other. However, only one of these products is formed.
Which trans dibromide is formed? How do you account for the fact that it is formed to the exclusion of the other trans dibromide?
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Alkenes can be hydrated to form alcohols by (1) hydroboration followed by oxidation with alkaline hydrogen peroxide and (2) acid-catalyzed hydration. Compare the product formed from each alkene by sequence (1) with those formed from (2).
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The reaction of 3-methylene-1-cyclohexene and HBr yields the four products shown in the attachment. Which two are formed at high temperatures and which two are formed at low temperatures? Why? Why is 1-bromo-3-methylenecyclohexane not formed?
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Chapter 6 Solutions
Organic Chemistry
Ch. 6.2 - Using the BDE values from Appendix 3, calculate...Ch. 6.3 - Name and draw a structural formula for the product...Ch. 6.3 - Prob. 6.3PCh. 6.3 - Propose a mechanism for the addition of HI to...Ch. 6.3 - Prob. 6.5PCh. 6.3 - Propose a mechanism for the acid-catalyzed...Ch. 6.3 - The acid-catalyzed hydration of...Ch. 6.3 - Complete these reactions. (a) (b)Ch. 6.3 - Draw the structure of the chlorohydrin formed by...Ch. 6.4 - Draw structural formulas for the alkene that gives...
Ch. 6.5 - Prob. 6.11PCh. 6.5 - Prob. 6.12PCh. 6.5 - What alkene with the molecular formula C6H12, when...Ch. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Predict the organic product(s) of the reaction of...Ch. 6 - Prob. 6.18PCh. 6 - Prob. 6.20PCh. 6 - Draw a structural formula for an alkene with the...Ch. 6 - Account for the fact that addition of HCl to...Ch. 6 - Account for the fact that treating propenoic acid...Ch. 6 - Draw a structural formula for the alkene with the...Ch. 6 - Draw the alternative chair conformations for the...Ch. 6 - Draw a structural formula for the cycloalkene with...Ch. 6 - Reaction of this bicycloalkene with bromine in...Ch. 6 - Terpin, prepared commercially by the...Ch. 6 - Propose a mechanism for this reaction and account...Ch. 6 - Treating 2-methylpropene with methanol in the...Ch. 6 - When 2-pentene is treated with Cl2 in methanol,...Ch. 6 - Treating cyclohexene with HBr in the presence of...Ch. 6 - Propose a mechanism for this reaction. 1-Pentane...Ch. 6 - Treating 4-penten-1-ol with bromine in water forms...Ch. 6 - Prob. 6.35PCh. 6 - Prob. 6.36PCh. 6 - Reaction of -pinene with borane followed by...Ch. 6 - Write structural formulas for the major organic...Ch. 6 - Draw the structural formula of the alkene that...Ch. 6 - Consider the following reaction. (a) Draw a...Ch. 6 - Prob. 6.42PCh. 6 - Prob. 6.43PCh. 6 - Show how to convert ethylene to these compounds....Ch. 6 - Show how to convert cyclopentene into these...Ch. 6 - Prob. 6.46PCh. 6 - Describe the stereochemistry of the bromohydrin...Ch. 6 - Prob. 6.49PCh. 6 - Treating 1,3-butadiene with 1 mole of HBr gives a...Ch. 6 - In this chapter, we studied the mechanism of the...Ch. 6 - As we have seen in this chapter, carbon-carbon...Ch. 6 - Prob. 6.53PCh. 6 - Prob. 6.54P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- (1) Predict the outcome of the addition of HBr to (a) trans-2-pentene, (b) 2-methyl-2-butene, and (c) 4-methylcyclohexene. How many isomers can be formed in each case? (2) Addition of HBr to 3,3-dimethyl-1-butene gives a mixture of two isomeric alkyl bromide products. Draw structures for the two products, and give a mechanistic explanation for their formation.arrow_forwardThe rate law for addition of Br2Br2 to an alkene is first order in Br2Br2 and first order in the alkene. Does this information suggest that the mechanism of addition of Br2Br2 to an alkene proceeds in the same manner as for addition of HBr? Explain.arrow_forwardAn isomer of tetramethylbenzene undergoes nitration to yield a single product. Based on this information, which isomer(s) of tetramethylbenzene could the starting material have been?arrow_forward
- The addition of water to aldehydes and ketones occurs rapidly, although it is not thermodynamically favored. What would be the product for the reaction above? Hint: Think of the self-ionization of water and the polarity of the carbonyl group.arrow_forwardReaction of this bicycloalkene with bromine in carbon tetrachloride gives a trans dibro- mide. In both (a) and (b), the bromine atoms are trans to each other. However, only one of these products is formed. CH3 CH3 CH3 Br Br CH,Cl, + Br2 or Br Br (a) (b) Which trans dibromide is formed? How do you account for the fact that it is formed to the exclusion of the other trans dibromide?arrow_forwardWrite IUPAC name of the products obtained by addition reactions of HBr to hex – 1 –ene.(i) in the absence of peroxide, and(ii) in the presence of peroxide.arrow_forward
- Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions -X티 Hö: H-O -CH3 -CH3 H30*arrow_forwardWrite the monobromination products of 1,4-dimethylcyclohexane and calculate the percentages of each product. Which is the major product?arrow_forwardBromine reacts with alkenes in methanol according to the equation when this reaction was carried out with 4-tert-butylcyclohexene, only one isomer was formed with the molecular formula C12H23BrO (80% yield). Which of the following is the structure more reasonable for this compound? Explain your reasoning through a corresponding mechanism.arrow_forward
- Acrolein and 1,3-cyclohexadiene react in a one-step concerted manner to yield a single product. Give the structure of the product. What kind of reaction is this an example of? In terms of this reaction, how would you classify acrolein? How would you classify 1,3-cyclohexadiene? Hint: acrolein is not a systematic name so you may need to look up its structure if you are not already familiar with it.arrow_forwardWhat would be the major product obtained from the reaction of Br2 with 1-butene if the reaction were carried out in the solvent dichloromethane? Draw the molecule.arrow_forwardThe molecule 2-methylbutane undergoes free radical mono-halogenation with bromine. Draw and name the four products that are constitutional isomers.arrow_forward
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