Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Chapter 10.9E, Problem 10.20P
In Section9-7B, we saw how acetylide ions add to carbonyl groups in much the same way as Grignard and organolithium reagents. Acetylide ions also add to ethylene oxide much like Grignard and organolithium reagents. Predict the products obtained by adding the following acetylide ions to ethylene oxide, followed by a dilute acid workup.
- a. HC ≡ C :−
- b. CH3CH2—C ≡ C :−
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1. Br₂, PBrg
2. H₂O
H₂C
OH
H3C
OH
Br
The a-bromination of carbonyl compounds by Br₂ in acetic acid is limited to aldehydes and ketones because acids, esters,
and amides don't enolize to a sufficient extent. Carboxylic acids, however, can be a-brominated by first converting the
carboxylic acid to an acid bromide by treatment with PBr3. Following enolization of the acid bromide, Br₂ reacts in an α-
substitution reaction. Hydrolysis of the acid bromide completes the reaction.
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Arrow-pushing Instructions
H3C
:0:
:0::Br:
Br
Br
H3C
CO-P
H
Br
Br
Identify the best reagents to complete the following reaction. Options are included.
Chapter 10 Solutions
Organic Chemistry (9th Edition)
Ch. 10.3A - Prob. 10.1PCh. 10.3B - Give both the IUPAC name and the common name for...Ch. 10.3B - Prob. 10.3PCh. 10.3C - Give a systematic (IUPAC) name for each diol. a....Ch. 10.4B - Predict which member of each pair will be more...Ch. 10.4B - Dimethylamine (CH3)2NH, has a molecular weight of...Ch. 10.6A - Prob. 10.7PCh. 10.6A - Prob. 10.8PCh. 10.6C - A nitro group (NO2) effectively stabilizes a...Ch. 10.6C - Prob. 10.10P
Ch. 10.8B - Prob. 10.11PCh. 10.8B - Prob. 10.12PCh. 10.9A - Prob. 10.13PCh. 10.9B - Prob. 10.14PCh. 10.9C - Show how you would synthesize each tertiary...Ch. 10.9D - Prob. 10.16PCh. 10.9D - Show how you would add Grignard reagents to acid...Ch. 10.9D - A formate ester, such as ethyl formate, reacts...Ch. 10.9E - Prob. 10.19PCh. 10.9E - In Section9-7B, we saw how acetylide ions add to...Ch. 10.9F - Prob. 10.21PCh. 10.10A - Prob. 10.22PCh. 10.10B - Prob. 10.23PCh. 10.11B - Predict the products you would expect from the...Ch. 10.11B - Prob. 10.25PCh. 10.11B - Prob. 10.26PCh. 10.12 - Prob. 10.27PCh. 10.12 - Prob. 10.28PCh. 10.12 - Authentic skunk spray has become valuable for use...Ch. 10 - Give a systematic (IUPAC) name for each alcohol....Ch. 10 - Give systematic (IUPAC) names for the following...Ch. 10 - Draw the structures of the following compounds...Ch. 10 - Predict which member of each pair has the higher...Ch. 10 - Predict which member of each pair is more acidic,...Ch. 10 - Predict which member of each group is most soluble...Ch. 10 - Draw the organic products you would expect to...Ch. 10 - Prob. 10.37SPCh. 10 - Show how you would synthesize the following...Ch. 10 - Show how you would use Grignard syntheses to...Ch. 10 - Show how you would accomplish the following...Ch. 10 - Show how you would synthesize the following: a....Ch. 10 - Complete the following acid-base reactions. In...Ch. 10 - Prob. 10.43SPCh. 10 - Prob. 10.44SPCh. 10 - Geminal diols, or 1,1-diols, are usually unstable,...Ch. 10 - Vinyl alcohols are generally unstable, quickly...Ch. 10 - Compound A (C7H11Br) is treated with magnesium in...Ch. 10 - Prob. 10.48SPCh. 10 - Prob. 10.49SPCh. 10 - Prob. 10.50SPCh. 10 - Prob. 10.51SPCh. 10 - Prob. 10.52SPCh. 10 - Prob. 10.53SPCh. 10 - Prob. 10.54SPCh. 10 - Prob. 10.55SPCh. 10 - Prob. 10.56SPCh. 10 - Show how this 1 alcohol can be made from the...Ch. 10 - Prob. 10.58SPCh. 10 - Prob. 10.59SPCh. 10 - Prob. 10.60SP
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