22. Answer ALL parts of this question. (a) If ethyne is treated according to the following scheme, the final product is

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22. Answer ALL parts of this question. (a) If ethyne is treated according to the following scheme, the final product is

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22 Answer All Parts Of This Question A If Ethyne Is Treated According To The Following Scheme The Final Product Is 1
22 Answer All Parts Of This Question A If Ethyne Is Treated According To The Following Scheme The Final Product Is 1 (115.87 KiB) Viewed 27 times
22. Answer ALL parts of this question. (a) If ethyne is treated according to the following scheme, the final product is trans-pent-2-ene, as shown: HIC CH (i) NaNH, / NH3 (ii) CH₂Br (iii) NaNH, / NH, (iv) CH₂CH₂Br (v) Na/NH3 H3C H C: C CH₂CH3 Show the structures of the intermediates formed after each of the first four steps and identify the mechanism involved in steps (ii) and (iv). (4 + 1 marks) (b) If cis-pent-2-ene was wanted as the final product, how would step (v) in the sequence above must be modified? (1 mark)
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