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Chapter 9, Problem 9.51P
Interpretation Introduction

(a)

Interpretation: The major alkene formed from the dehydration of A with H2SO4 is to be stated.

Concept introduction: Alcohols undergo dehydration reaction in the presence of strong acids like H2SO4 or p-toluenesulfonicacid(TsOH) and yield alkenes. The dehydration of secondary and tertiary alcohols occurs in three steps and it is E1 reaction. The first step is protonation of OH to form good leaving group. The second step is heterolytic cleavage of CO bond to form a carbocation (carbocation rearrangement is possible). The third step is abstraction of proton by a base (HSO4orH2O) from a carbon adjacent to the carbocation to result the new π bond.

Interpretation Introduction

(b)

Interpretation: The major alkene formed from the dehydration of A with POCl3,andpyridine, and an explanation that corresponds to the different major products in these reactions are to be stated.

Concept introduction: Alcohols undergo dehydration reaction in the presence of POCl3,pyridine, and yield alkenes. The mechanism of the reaction is E2 and it does not involve carbocation rearrangement. This dehydration reaction involves two steps. The first step is protonation of OH to form good leaving group. The second step is loss of the leaving group and removal of the β proton.

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Chapter 9 Solutions

Package: Loose Leaf for Organic Chemistry with Biological Topics with Connect Access Card

Ch. 9 - Problem 9.11 Draw the products formed when each...Ch. 9 - Prob. 9.12PCh. 9 - Problem 9.13 Draw the structure of each...Ch. 9 - What other alkene is also formed along with Y in...Ch. 9 - Prob. 9.15PCh. 9 - Explain why two substitution products are formed...Ch. 9 - Draw the products of each reaction. a. b. c.Ch. 9 - Problem 9.18 Draw the products of each reaction,...Ch. 9 - Problem 9.19 What is the major product formed...Ch. 9 - Prob. 9.20PCh. 9 - Prob. 9.21PCh. 9 - Problem 9.22 Draw the organic products formed in...Ch. 9 - Problem 9.23 Draw two steps to convert into each...Ch. 9 - Prob. 9.24PCh. 9 - Problem 9.25 Draw the products of each reaction,...Ch. 9 - Draw the products formed when (S)-butan-2-ol is...Ch. 9 - Draw the product formed when (CH3)2CHOH is treated...Ch. 9 - What alkyl halides are formed when each ether is...Ch. 9 - Explain why the treatment of anisole with HBr...Ch. 9 - Name each thiol. a. b. Ch. 9 - Draw the product of each reaction. ac b.d.Ch. 9 - Give the IUPAC name for each sulfide. a. b. Ch. 9 - Draw the product of each reaction. a. b. Ch. 9 - Prob. 9.34PCh. 9 - The cis and trans isomers of 2, 3-dimethyloxirane...Ch. 9 - Problem 9.36 Draw the product of each...Ch. 9 - 9.37 Name each compound depicted in the...Ch. 9 - Answer each question using the ball-and-stick...Ch. 9 - Prob. 9.39PCh. 9 - 9.40 Give IUPAC name for each...Ch. 9 - Prob. 9.41PCh. 9 - Prob. 9.42PCh. 9 - Prob. 9.43PCh. 9 - 9.44 Why is the boiling point of higher than...Ch. 9 - 9.45 Draw the organic product(s) formed when is...Ch. 9 - 9.46 What alkenes are formed when each alcohol is...Ch. 9 - Prob. 9.47PCh. 9 - 9.48 Draw the products of each reaction and...Ch. 9 - 9.49 Draw the product of the following reaction,...Ch. 9 - Prob. 9.50PCh. 9 - Prob. 9.51PCh. 9 - 9.52 Draw a stepwise mechanism for the following...Ch. 9 - 9.53 Although alcohol V gives a single alkene W...Ch. 9 - Prob. 9.54PCh. 9 - Prob. 9.55PCh. 9 - Prob. 9.56PCh. 9 - 9.57 Draw a stepwise, detailed mechanism for the...Ch. 9 - Prob. 9.58PCh. 9 - 9.59 Draw two different routes to each of the...Ch. 9 - Prob. 9.60PCh. 9 - 9.61 Draw the products formed when each ether is...Ch. 9 - 9.62 Draw a stepwise mechanism for each...Ch. 9 - Draw a stepwise, detailed mechanism for the...Ch. 9 - Prob. 9.64PCh. 9 - Draw the products of each reaction. a.c. b.d.Ch. 9 - When each halohydrin is treated with, a product of...Ch. 9 - Prob. 9.67PCh. 9 - Prob. 9.68PCh. 9 - Prob. 9.69PCh. 9 - Prob. 9.70PCh. 9 - Prepare each compound from cyclopentanol. More...Ch. 9 - 9.72 Identify the reagents (a–h) needed to carry...Ch. 9 - Prob. 9.73PCh. 9 - 9.74 Treatment of with affords compound A and ....Ch. 9 - Prob. 9.75PCh. 9 - Prob. 9.76PCh. 9 - 9.77 Draw a stepwise, detailed mechanism for the...Ch. 9 - 9.78 Dehydration of with affords as a minor...Ch. 9 - Prob. 9.79PCh. 9 - 9.80 Draw a stepwise mechanism for the following...Ch. 9 - 9.81 Aziridines are heterocycles that contain an...
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