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Answer with regard to the bromination of cis-hex-3-ene shown in Figure 4. Draw the structure of the dibromohexane(s) which arise from reaction of Brz with
Answer with regard to the bromination of cis-hex-3-ene shown in Figure 4. Draw the structure of the dibromohexane(s) which arise from reaction of Brz with cis-hex-3-ene. Using the curly arrow notation, draw a mechanism for this reaction. Use your mechanism to discuss the stereochemistry of the reaction product(s) you propose. Dibromohexane(s) cis-hex-3-ene + Brz Figure 4 Answer the following with regard to Figure 5 which shows a base induced dehydrohalogenation reaction forming alkene products by an E2 mechanism. Draw the structure of all possible alkene products from elimination of HBr from the alkylbromide (4) by reaction with sodium ethoxide. Classify each of your suggested alkene products as mono-, di-, tri, or tetrasubstituted. Indicate which of your predicted alkene structures you expect to be the major product and account for your choice. Using curly arrow notation, draw a mechanism for the reaction leading to the structure you propose as the major product. Br + NaOET Alkene Products (4) Figure 5 Carefully, with consideration of their stereochemistry, draw the structures of (5), 6 (7) and (8) formed by the reactions shown below in Figure 6. H2 Pd/C 1. 03. -78C (5) 2. H2O2 Et m-CPBA H30* (7) (6) Figure 6
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