Which of the following provides the best explanation for why the 1,2-addition product of the following reaction is favored? HBr ? 40°C O This reaction is under thermodynamic control, which favors the formation of the more stable trisubstituted double bond. O The reaction is under kinetic control which always gives the 1,2-addition product. O The reaction is under thermodynamic control which always gives the 1,2-addition product. O The 1,4-adduct is more stable and these conditions favor the less substituted alkene O The 1,2-adduct is less stable and thus is formed faster under the reaction conditions.
Which of the following provides the best explanation for why the 1,2-addition product of the following reaction is favored? HBr ? 40°C O This reaction is under thermodynamic control, which favors the formation of the more stable trisubstituted double bond. O The reaction is under kinetic control which always gives the 1,2-addition product. O The reaction is under thermodynamic control which always gives the 1,2-addition product. O The 1,4-adduct is more stable and these conditions favor the less substituted alkene O The 1,2-adduct is less stable and thus is formed faster under the reaction conditions.
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter8: Addition Via Carbocation
Section: Chapter Questions
Problem 3E: Explain why ethene does not react with HX ( X=Cl , Br or I) under normal conditions.
Related questions
Concept explainers
Reactions of Ethers
Ethers (R-O-R’) are compounds formed by replacing hydrogen atoms of an alcohol (R-OH compound) or a phenol (C6H5OH) by an aryl/ acyl group (functional group after removing single hydrogen from an aromatic ring). In this section, reaction, preparation and behavior of ethers are discussed in the context of organic chemistry.
Epoxides
Epoxides are a special class of cyclic ethers which are an important functional group in organic chemistry and generate reactive centers due to their unusual high reactivity. Due to their high reactivity, epoxides are considered to be toxic and mutagenic.
Williamson Ether Synthesis
An organic reaction in which an organohalide and a deprotonated alcohol forms ether is known as Williamson ether synthesis. Alexander Williamson developed the Williamson ether synthesis in 1850. The formation of ether in this synthesis is an SN2 reaction.
Question
Transcribed Image Text:Which of the following provides the best explanation for why the 1,2-addition product of the following reaction is favored?
HBr
40°C
This reaction is under thermodynamic control, which favors the formation of the more stable trisubstituted double bond.
O The reaction is under kinetic control which always gives the 1,2-addition product.
The reaction is under thermodynamic control which always gives the 1,2-addition product.
O The 1,4-adduct is more stable and these conditions favor the less substituted alkene
The 1,2-adduct is less stable and thus is formed faster under the reaction conditions.
Transcribed Image Text:Identify the products of the 1,4-addition for the following reaction.
HBr
Br
Br
+ En
Br
Br
II
II
IV
O l and II
I and IV
O Il and III
O Il and IV
O III and IV
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