Package: Loose Leaf for Organic Chemistry with Biological Topics with Connect Access Card
5th Edition
ISBN: 9781260170405
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 8, Problem 8.19P
Explain why cis-1-chloro-2-methylcyclohexane undergoes E2 elimination much
faster than its trans isomer.
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Students have asked these similar questions
The rate of elimination of cis-1-bromo-4(1,1-dimethyl)cyclohexane is proportional to the concentration of both substrate and base, but that of the trans isomer is proportional only to the concentration of the substrate.
a) draw the structures of cis and trans 1-bromo-4(1,1,-dimethyl)cyclohexane
b) explain the difference in kinetics between the elimination reaction of cis and trans isomers.
Why do cis-1-bromo-2-ethylcyclohexane and trans-1-bromo-2-ethylcyclohexane form different major products when they undergo an E2 reaction?
CH3
CH3
Br-
Br2
CH2CI2
CH3
CH3
H3C
H3C
Br
Electrophilic addition of bromine, Br2, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a
bromonium ion. The reaction occurs in an anhydrous solvent such as CH2C12.
In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to
steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry
is formed.
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Arrow-pushing Instructions
CH3
CH3
Br-
.CH3
.CH3
H3C
H3C
:Br
:Br:
Chapter 8 Solutions
Package: Loose Leaf for Organic Chemistry with Biological Topics with Connect Access Card
Ch. 8 - Problem 8.1 Label the and carbons in each alkyl...Ch. 8 - Problem 8.2 Classify each alkene in the following...Ch. 8 - Prob. 8.3PCh. 8 - Prob. 8.4PCh. 8 - Problem 8.5 Label each pair of alkenes as...Ch. 8 - Problem 8.6 Which alkene in each pair is more...Ch. 8 - Problem 8.7 Several factors can affect alkene...Ch. 8 - Prob. 8.8PCh. 8 - Prob. 8.9PCh. 8 - Prob. 8.10P
Ch. 8 - Prob. 8.11PCh. 8 - Problem 8.12 What alkenes are formed from each...Ch. 8 - Prob. 8.13PCh. 8 - Problem 8.14 What alkenes are formed from each...Ch. 8 - Problem 8.15 How does each of the following...Ch. 8 - Problem 8.16 Draw both the SN1 and E1 products of...Ch. 8 - Prob. 8.17PCh. 8 - Prob. 8.18PCh. 8 - Problem 8.19 Explain why...Ch. 8 - Prob. 8.20PCh. 8 - Problem 8.21 Draw the alkynes formed when each...Ch. 8 - Problem 8.22 Draw the products in each...Ch. 8 - Problem 8.23 Draw a stepwise mechanism for the...Ch. 8 - 8.24 Rank the alkenes shown in the ball-and-stick...Ch. 8 - Prob. 8.25PCh. 8 - 8.26 What is the major E2 elimination product...Ch. 8 - Prob. 8.27PCh. 8 - Prob. 8.28PCh. 8 - Prob. 8.29PCh. 8 - 8.30 Label each pair of alkenes as constitutional...Ch. 8 - Prob. 8.31PCh. 8 - Prob. 8.32PCh. 8 - Prob. 8.33PCh. 8 - For each of the following alkenes, draw the...Ch. 8 - Prob. 8.35PCh. 8 - Prob. 8.36PCh. 8 - Prob. 8.37PCh. 8 - What alkene is the major product formed from each...Ch. 8 - Prob. 8.39PCh. 8 - Prob. 8.40PCh. 8 - Pick the reactant or solvent in each part that...Ch. 8 - 8.42 In the dehydrohalogenation of...Ch. 8 - Prob. 8.43PCh. 8 - Prob. 8.44PCh. 8 - Prob. 8.45PCh. 8 - Prob. 8.46PCh. 8 - Prob. 8.47PCh. 8 - Prob. 8.48PCh. 8 - What alkyl chloride affords the following alkene...Ch. 8 - Draw the products formed when each dihalide is...Ch. 8 - Draw the structure of a dihalide that could be...Ch. 8 - Under certain reaction conditions, 2,...Ch. 8 - For which reaction mechanisms, SN1, SN2, E1 or...Ch. 8 - Draw the organic products formed in each...Ch. 8 - Prob. 8.55PCh. 8 - Draw all products, including stereoisomers, in...Ch. 8 - Draw all of the substitution and elimination...Ch. 8 - Prob. 8.58PCh. 8 - 8.59 Draw a stepwise, detailed mechanism for each...Ch. 8 - Draw the major product formed when...Ch. 8 - Draw a stepwise, detailed mechanism for the...Ch. 8 - Explain why the reaction of with gives ...Ch. 8 - Draw a stepwise detailed mechanism that...Ch. 8 - Prob. 8.64PCh. 8 - 8.65 Explain the selectivity observed in the...Ch. 8 - Prob. 8.66PCh. 8 - Prob. 8.67PCh. 8 - 8.68 (a) Draw all products formed by treatment of...
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