Task

The following sequence is given: CaC₂ →(H₂O) A →(H₂O, Hg²⁺, H⁺) B →(Cu(OH)₂, heat) C →(Cl₂, red phosphorus) D →(NH₃, excess) E →(HCl) F; 2E →(−H₂O) G. 1) Write the preparation of A and name A. 2) Write the formation of B (Kucherov reaction), showing the intermediate enol. 3) Write the conversion of B into C and explain which functional group this reaction detects. 4) Write the conversion of C into D, showing which carbon atom receives the halogen. 5) Write the preparation of E from D and explain why excess ammonia is used. 6) Write the reaction of E with hydrochloric acid and explain why E is amphoteric. 7) Write the formation of G, show the peptide bond and name G. No calculations are required: for each part give the reaction equations (with structural formulas), conditions, names of substances and the necessary explanations.