number 4 4. Each of the following alkyl bromides gives only one product in via an E2 mechanism. Provide the mechanism and the product for each of the following reaction. Draw Newman projections to determine the E/Z diastereomers.**Structures:**1. **Top Structure:** - A bromine (Br) atom is attached to the second carbon of an alkyl chain, which is bonded to a phenyl group on the left. The chain also includes two additional carbons to the right of the Br. The bond connected to the Br is depicted with a dashed line, indicating stereochemistry.2. **Bottom Structure:** - A similar alkyl bromide structure as the top one, but the stereochemistry of the Br is indicated with a solid wedge, projecting outward. The rest of the structure is the same with a phenyl group attached to the first carbon and an ethyl chain extending from the second carbon with the Br.Both structures indicate E2 reactions, which are bimolecular elimination reactions leading to the formation of alkenes. The E/Z notation will be determined through Newman projections, which provide a visual representation of the stereochemistry and confirm the geometric isomer produced.

The different 3-dimensional arrangement of atoms that results due to free rotation about C-C single bond is termed as conformations. In Newman's projection, a dot and a circle represent the 2 C-atoms which are linked through the sigma bond. The dot represents the front C-atom whereas the circle represents the rear C-atom. In the first reaction, in the reactant compound, first, we have to make H-atom and Br-atom anti to each other. For E2 elimination it is necessary that H and Br are anti periplanar. The conversion of the given structure into Newman projection is shown below which is followed by the mechanism for the formation of the final product. Thus, we can conclude that the final product is Z isomer.In the second reaction, in the reactant compound, we already have H-atom and Br-atom anti to each other. The conversion of the given structure into Newman projection is shown below which is followed by the mechanism for the formation of the final product. Thus, we can conclude that the final product is E isomer.

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4. Each of the following alkyl bromides gives only one product in via an E2 mechanism. Provide the mechanism and the product for each of the following reaction. Draw Newman projections to determine the E/Z diastereomers. Br E2 Br E2

4. Each of the following alkyl bromides gives only one product in via an E2 mechanism. Provide the mechanism and the product for each of the following reaction. Draw Newman projections to determine the E/Z diastereomers. Br E2 Br E2

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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