Consider the elimination reaction shown here, which CH3 H3C Base produces a mixture of diastereomers. Based on the stereochemistry of this reaction alone, is it possible to tell whether the reaction takes place via an E1 or an E2 reaction? Explain. H H3C Br H3C CH3 CH3
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- List the following order of increasing reactivity in an SN1 reactionDraw a detailed mechanism for the FeBr3@catalyzed reaction of ethylbenzene with bromine, and show why the sigma complex (and the transition state leading to it) is lower in energy for substitution at the ortho and para positions than it is for substitution at the meta position.What will be the major product of the following reaction and what is the likely mechanism for its formation? (CH;);COK Br racemic OCCCH3)3 OCCH3)3 ÓCCCH3)3 A B C D E
- Q12. (1-bromoethyl)benzene 1 udergoes an elimination following an E1 mechanism. Fill in the following synthetic scheme by drawing the structure of intermediate 2 and product 3. The chemical formula of product 3 is provided as guidance. CH; RDS Br C3Hg E1 2 3What reagents are necessary to carry out the conversion shown? O OCH3CH₂ONa; H₂O OCH3CH₂MgBr; H₂O HO OCH3CH₂CH₂ONA; H₂O OCH3CH₂CH₂MgBr; H₂OMake a table with the main conditions for each mechanism: E1, E2, SN1, SN2.
- Given that an E2 reaction proceeds with anti periplanar stereochemistry, draw the products of each elimination. The alkyl halides in (a) and (b) are diastereomers of each other. How are the products of these two reactions related? Recall from Section 3.2A that C6H5– is a phenyl group, a benzene ring bonded to another group.Given that an E2 reaction proceeds with anti periplanar stereochemistry, draw the products of each elimination. The alkyl halides in (a) and (b) are diastereomers of each other. How are the products of these two reactions related? Recall from Section 3.2A that C6H5 −is a phenyl group, a benzene ring bonded to another group.Predict the product, draw the mechanism, and plot the reaction coordinate diagram for theE1 reaction.