When cyclopentone was treated with bromine in methanol as solvent, dibromide U and 00-halogenation product V...
When cyclopentone was treated with bromine in methanol as solvent, dibromide U and 00-halogenation product V were observed. 62 MeOH ‘OME 7 (a) Explain briefly the formation of anti-dibromide U instead of syn-dibromide in this reaction with the aid of reaction mechanism. (2 marks) (b) Account for the formation of co-halogantion product V in this reaction. (2 marks) (c) Suggest a modification to the reaction condition such that ONLY dibromide U would be formed. (1 marks) (d) Suggest a modification to the reaction condition such that ONLY co-halogenation product V would be formed. (1 marks) (e) Predict the structures of the major co-halogenation product in the following reactions: (2 marks each) Bra CH3COOH - W 1. Brz. CH3CN - 2. H2O (work up) X (CHH,2BINO)